5. Draw a circle in a square, and the area of the circle is12.56cm^2 then the area of the square is( )cm^2 at least (至少).A. 12.56B. 14C. 16D. 20 相关知识点: 试题来源: 解析 C. 16 已知圆的面积为12.56平方厘米,根据圆的面积公式,可求得圆的半径为2厘米。由于圆内切于正方...
shapes[1] = new Square(4.0); shapes[2] = new Circle(3.0); double totalArea = 0.0; // 所有图形的总面积 // 遍历数组,调用每个图形的getArea()函数,并累加面积 for (int i = 0; i < numShapes; i++) { double area = shapes[i]->getArea(); ...
A circle has a diameter of142mm.What is the area of the circle in square meters? Area of a Circle: The area of a circle is the space occupied by the interior of the two dimensional circle shape. The area of a circle is calculated using a special ratio called "pi"(π)and ...
Imagine we have a circular garden with a radius of 5 meters: Area=πr2 =π× (5 m)2 =78.5m2(to 1 decimal) Or, using the Diameter: A = (π/4) × D2 Area Compared to a Square A circle hasabout 80%of the area of a similar-width square. The actual value is (π/4) = 0.7...
a section of seats in a theater: dress circle. the area within which something acts, exerts influence, etc.; realm; sphere: A politician has a wide circle of influence. a series ending where it began, especially when perpetually repeated; cycle: ...
As there is no diagram, first draw a square in a circle. As the area of the circle is 9π, the radius is 3 (Area = π r^2). How does this help? Often on the SAT, questions involving squares are really about the diagonal of the square, so draw in the diagonal. The diagonal ...
【解析】C The diameter of the circle is equal to the length of a side of the square. The area of the square is 10×10=100. 一个圆内切在一个正方形上,如果圆的直径是10,那么正方形的面积是多少( ). A. 40 B. 25 C. 100 D. 400 圆的直径等于正方形边长,正方形的面积是10×10=100. ...
sit in a circle 环坐 square the circle 做办不到的事情 五、词义辨析 rotate，revolve，roll，spin，turn，whirl，circle这些动词均有“转动、旋转”之意。rotate侧重指物体围绕自己的轴或中心旋转，即自转。revolve强调指物体围绕本身以外的中心旋转，即公转。roll指某物在平面上滚动或翻滚。spin指沿...
The area of a circle inscribed in a square is given, and we know that the diameter of the circle is equal to the side length of the square. 2. Use the formula for the area of a circle: The area A of a circle is given by the formula: A=πr2 where r is the radius of the ...
Example: Sam cuts grass at $0.10 per square meter How much does Sam earn cutting this area: Let's break the area into two parts: Part A is a square: Area of A = a2 = 20m × 20m = 400m2 Part B is a triangle. Viewed sideways it has a base of 20m and a height of 14m. Are...