单选题What is the circumference of a circle in which a 5 by 12 rectangle is inscribed?A 13nB 17nC 26nD 34nE 60n

题目

单选题

What is the circumference of a circle in which a 5 by 12 rectangle is inscribed?

13n

17n

26n

34n

60n

相似考题

1.阅读下列程序说明和C代码，把应填入其中n处的字句写在对应栏内。【说明】下面的程序能够计算不同图形的面积。程序中把每个图形的数据定义成结构类型，利用共同体类型描述2种图形的数据。程序根据输入参数代表的图形类型，求出图形的面积并输出。【程序】struct Circle{float x，y； /*圆心位置*/float r； /*圆半径*/}；struct Rectangle{float width； /*矩形宽*/float length； /*矩形长*/}；union shape{struct Circle circle；/*圆数据结构*/struct Rectangle rectangle；/*矩形数据结构*/}；main(){union shape a；float area；int i；printf(“input number： 1circle，2rectangle，3 end\n”)；scanf("%d"，&i)；while (1) /*循环接收输入，并计算输出*/{switch(i){case 1：printf(“input radius：\n”)；scanf(“%f”， (2)；/*共同体类型变量接收输入*/area=3.1415926* (3)；printf(“the area of circle=%f\n”，area)；break；case 2：printf(“input width and length :\n”)；seanf(“%f，%f”， (4)；/*共同体类型变量接收输入*/。area=(5)；printf(“the area of rectangle=%f\n”，area)；break；}printf(“input number：1 circle，2 rectangle，3 end\n”)；scanf(“%d”，&i)；}}

2.阅读以下说明和C++代码，填入(n)处。[说明]以下C++代码使用虚函数实现了同一基类shape派生出来的Class rectangle、Class triangle、Class circle实现了计算矩形、圆形面积的计算。仔细阅读以下代码，将(n)处语句补充完整。[代码5-1]include＜iostream.h＞define PI 3.14159class shape {//基类protected：(1)；public：(2)；(3)；}；[代码5-2]class rectangle: public shape {public:rectangle (int x2,int y2,int r2): (4) {};double area ( ) {return x*y; };};class circle: public shape {public:circle (int x3,int y3,int r3):(5){};double area ( ) {return r*r*PI; };};[代码5-3]void main ( ){rectangle r (10,20,0);circle c (0,0,30);shape (6)；cout＜＜"长方形面积="＜＜s1-＞area ( ) ＜＜endl；cout＜＜"圆形面积="＜＜s2-＞area ( ) ＜＜endl；}[运行结果]长方形面积=200圆形面积=2827.43

3.In relation to the turning circle of a ship, the term advance means the distance ______.A.gained at right angles to the original courseB.gained in the direction to the original courseC.moved sidewise from the original course when the rudder is first put overD.around the circumference of the turning circle

4.The(71) is a general description of the architecture of a workflow management system used by the WFMC, in which the main components and the associated interfaces are summarized. The workflow enactment service is the heart of a workflow system which consists of several(72). In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a(73), which consists of(74) indicated using a circle, and(75) shown as a rectangle. These two components can be linked by means of a directed arc.A．waterfall modelB．workflow reference modelC．evolutionary modelD．spiral model

参考答案和解析

正确答案： D

解析：
The length of a diagonal of a 5 by 12 rectangle is 13 since, when a diagonal is drawn, the lengths of the sides of the right triangle that results form a (5,12,13) Pythagorean triple with 13 as the hypotenuse. If this rectangle is inscribed in a circle, the diagonals of the rectangle are diameters of the circle, so the length of a diameter of the circle is 13. The circumference of a circle with diameter 13 is 13π.

更多“单选题What is the circumference of a circle in which a 5 by 12 rectangle is inscribed?A 13nB 17nC 26nD 34nE 60n”相关问题

第1题：

In relation to the turning circle of a ship, the term transfer means the distance ______.
A.gained in the direction to the original course
B.gained at right angles to the original course
C.the ship moves sidewise from the original course away from the direction of the turn after the rudder is first put over
D.around the circumference of the turning circle

正确答案：C
关于船舶的旋回圈，术语横距（又称“正移量”）意指船舶获得与初始航向成直角时船体的横向移动距离。
第2题：

In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a __请作答该选项__, which consists of ____ indicated using a circle, and ____ shown as a rectangle. These two components can be linked by means of a directed arC．

A.PERT diagram
B.DFD
C.Petri Net
D.ER diagram

答案：C
解析：
第3题：

Which statements concerning the effect of the statement gfx.drawRect（5， 5， 10， 10） are true， given that gfx is a reference to a valid Graphics object？（）
- A、The rectangle drawn will have a total width of 5 pixels.
- B、The rectangle drawn will have a total height of 6 pixels.
- C、The rectangle drawn will have a total width of 10 pixels.
- D、The rectangle drawn will have a total height of 11 pixels.
正确答案:D
第4题：

单选题
If the area of a square with sides of length 8 centimeters is equal to the area of a rectangle with a width of 4 centimeters, what is the length of the rectangle, in centimeters?
A
4
B
8
C
12
D
16
E
18

正确答案： A
解析：
设长方形长为x，故4x=8×8，x=16，故本题选D项。
第5题：

单选题
In the figure below, a small circle, with radius x, is inside a larger circle, with radius 6. What is the area, in terms of x, of the shaded region?
A
6π-2πx
B
6π-πx²
C
12π-2πx
D
36π-2πx
E
36π-πx²

正确答案： E
解析：
根据图示可知，阴影部分的面积等于大圆的面积减去小圆的面积，即36π- x²π，因此选E。
第6题：

单选题
The base of a rectangle is two times as long as the height. If the perimeter is 42, what is the area of the rectangle?
A
36
B
42
C
98
D
196
E
218

正确答案： D
解析：
If h represents the height, then the base is 2h. Since Perimeter=42=2(h+2h), hence h=7 and base=14. So Area=7×14=98.
第7题：

单选题
What is the（）of the turning circle in mavoeuvring?
A
distance
B
largeness
C
diameter
D
measurerment

正确答案： A
解析：暂无解析
第8题：

单选题
In relation to the turning circle of a ship , the term kick means the distance（）.
A
around the circumference of the turning circle
B
gained at right angles to the original course
C
gained in the direction of the original course
D
or throw of a vessels stern from her line of advance upon putting the helm hard over

正确答案： B
解析：暂无解析
第9题：

单选题
What is the circumference of a circle in which a 5 by 12 rectangle is inscribed?
A
13n
B
17n
C
26n
D
34n
E
60n

正确答案： C
解析：
The length of a diagonal of a 5 by 12 rectangle is 13 since, when a diagonal is drawn, the lengths of the sides of the right triangle that results form a (5,12,13) Pythagorean triple with 13 as the hypotenuse. If this rectangle is inscribed in a circle, the diagonals of the rectangle are diameters of the circle, so the length of a diameter of the circle is 13. The circumference of a circle with diameter 13 is 13π.
第10题：

问答题
A rectangle is equal in area to a square with sides of length 12. Is the diagonal of the rectangle greater in length than 20?　　(1) The rectangle has a length of 16.　　(2) The rectangle has a width of 9.

正确答案： D
解析：
通过计算可知，若长方形长为16或宽为9，面积为144，其对角线长度均小于20，故本题选D项。
第11题：

单选题
In relation to the turning circle of a ship , the term transfer means the distance（）.
A
gained in the direction of the original course
B
gained at right angles to the original course
C
the ship moves sidewise from the original course awayfrom the transfer means the distance
D
around the circumference of the turning circle

正确答案： B
解析：暂无解析
第12题：

单选题
If the ratio of the area of a sector to the area of the circle is 2：3. what is the ratio of the length of the arc in the sector to the circumference of the circle?
A
3/2
B
2/3
C
4/9
D
1/4
E
9/4

正确答案： D
解析：
The ratio of sector area to circle area is proportional to the ratio of sector arc length to circumference.
第13题：

In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a ____, which consists of __请作答该选项__ indicated using a circle, and ____ shown as a rectangle. These two components can be linked by means of a directed arC．

A.positions
B.resources
C.conditions
D.places

答案：D
解析：
第14题：

The ____ is a general description of the architecture of a workflow management system used by the WFMC, in which the main components and the associated interfaces are summarizeD．The workflow enactment service is the heart of a workflow system which consists of several ____. In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a ____, which consists of ____ indicated using a circle, and __请作答该选项__ shown as a rectangle. These two components can be linked by means of a directed arC．

A.trasitions
B.transformations
C.transmitters
D.changes

答案：A
解析：
工作流参考模型是WFMC用来对工作流管理系统架构的通用描述，在这个模型中，对主要组件和相关接口进行了概括。工作流例行服务是工作流系统的核心，由几个工作流引擎组成。在工作流系统中，过程是使用过程定义该来加以说明的。通常情况下，过程通过Petri网的术语来进行定义，其中包括位置（用圆圈表示）和变迁（用矩形表示），这两个组件通过带箭头的弧相连。
第15题：

在用REVOLVE命令生成旋转实心体时，以下说法（）是正确的。
- A、旋转轮廓线不是由PLINE生成的
- B、旋转轮廓线可以是由LINE画成的图形，但经过多义化编辑，旋转轴位于轮廓线外
- C、旋转轮廓线用CIRCLE生成，旋转轴位于CIRCLE的内侧
- D、旋转轮廓线用RECTANGLE生成，旋转轴位于RECTANGLE的内侧
正确答案:B
第16题：

单选题
关于图3.19的叙述（）是不正确的。
A
Rectangle类和Circle类都有名为area的属性，这两个属性一定是相同的属性
B
Rectangle类和Circle类都有名为getArea的操作，这两个操作一定是相同的操作
C
Rectangle中名为length的属性和Circle类中名为radius的属性，这两个属性一定是不同的属性
D
Shape类有一个属性，Circle类有两个属性，Rectangle类有三个属性

正确答案： C
解析：在父类与子类的继承关系中，多态这种方法使得在多个子类中可以定义同一个操作或属性名，并在每个子类中可以有不同的实现。Rectangle和Circle都继承于父类Shape，对于Shape而言，会有getArea（）的操作。但是子类Rectangle和Circle的getArea方法的实现可以完全不一样的，这就体现了多态的特征。至于选项D://Circle类和Rectangle类都要从Shape类继承一个属性，因此分别有"1+1=2"个属性和"2+1=3"个属性。
第17题：

单选题
The length of a rectangle is 5 more than the side of a square, and the width of the rectangle is 5 less than the side of the square. If the area of the square is 45, what is the area of the rectangle?
A
20
B
25
C
45
D
50
E
70

正确答案： D
解析：
设正方形的边长为x，那么根据题意有x²=45，所以矩形的面积为 (x+5)(x-5) =x²-25=45-25=20。
第18题：

单选题
Which statements concerning the effect of the statement gfx.drawRect（5， 5， 10， 10） are true， given that gfx is a reference to a valid Graphics object？（）
A
The rectangle drawn will have a total width of 5 pixels.
B
The rectangle drawn will have a total height of 6 pixels.
C
The rectangle drawn will have a total width of 10 pixels.
D
The rectangle drawn will have a total height of 11 pixels.

正确答案： D
解析：暂无解析
第19题：

单选题
In relation to the turning circle of a ship，the term advance means the distance（）.
A
gained at right angles to the original course
B
gained in the direction of the original course
C
moved sidewise from the original course when the rudder is first put over
D
around the circumference of the turning circle

正确答案： C
解析：暂无解析
第20题：

填空题
If a circle has an area of 49π, what is the diameter of the circle?____

正确答案： 14
解析：
因为圆的面积为πr²，πr²=49π，r=7，直径为2r=14。
第21题：

单选题
A circle with center A has its center at (6, -2) and a radius of 4. Which of the following is the equation of a line tangent to the circle with center A ?
A
y＝3x+2
B
y＝2x+1
C
y＝-x+5
D
y＝-2
E
y＝-6

正确答案： A
解析：
切线指与圆相交且与圆只有一个焦点的线。A、B与圆不相交。C、D 与圆相交且有两个交点。只有E项符合。
第22题：

单选题
A circle has an area of A, A second circle has a diameter four times that of the first circle. What is the area of the second circle?
A
2A
B
4A
C
8A
D
16A
E
32A

正确答案： D
解析：
设圆1的半径为r，所以A=πr²，所以圆2的半径为2r，面积=2*π*(2r)²=16πr²=16A，故本题应选D项。
第23题：

单选题
Circles O and P intersect at exactly one point, as shown in the figure above. If the radius of circle O is 2 and the radius of circle P is 6, what is the circumference of any circle that has OP as a diameter?
A
4π
B
8π
C
12π
D
16π
E
64π

正确答案： E
解析：
Since the radius of circle O is 2 and the radius of circle P is 6, OP = 2+6 or 8. Hence, the circumference of any circle that has OP as a diameter is 8π.
第24题：

单选题
在用REVOLVE命令生成旋转实心体时，以下说法（）是正确的。
A
旋转轮廓线不是由PLINE生成的
B
旋转轮廓线可以是由LINE画成的图形，但经过多义化编辑，旋转轴位于轮廓线外
C
旋转轮廓线用CIRCLE生成，旋转轴位于CIRCLE的内侧
D
旋转轮廓线用RECTANGLE生成，旋转轴位于RECTANGLE的内侧

正确答案： D
解析：暂无解析

单选题What is the circumference of a circle in which a 5 by 12 rectangle is inscribed?A 13nB 17nC 26nD 34nE 60n

题目

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参考答案和解析

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