Area is defined as the total space taken up by a flat 2D shape of an object. Learn the definition, forumulas, area of composite figures, solved examples and more!
Learn what area is in math, read an easy-to-understand area definition and have a go at some practice questions!
What is the center of the circle if the circle's equation is (x - 2)^2 + (y + 3)^2 = 25? What is a center of rotation in geometry? If 2 x^2 + 8 x + 24 + 2 y^2 + 12 y - 32 = 100, then what is the center point and radius of the circle? What is the distance...
The area of a circle is 49π square meters. What is its radius? A. 7 meters B. 14 meters C. 21 meters D. 28 meters 相关知识点: 试题来源: 解析 A。本题考查圆的面积公式的逆运算。圆的面积公式是 S=πr²(S 是面积,r 是半径),已知面积是 49π 平方米,那么 r²=S÷π=49π÷...
Example 3:If the radius of a circle is 36 cm, what will be the length of its diameter? Solution: It is stated thatradius (r) = 36 cm As we know, the diameter of a circle is twice the radius. Then,Diameter (d) = 2 × r ...
The diameter of a circle is 8 cm. What is its radius? A. 2 cm B. 4 cm C. 6 cm D. 16 cm 相关知识点: 试题来源: 解析 B。本题考查圆的直径和半径的关系。“radius”是半径,“diameter”是直径,半径是直径的一半,直径 8 厘米,半径就是 4 厘米。A 选项 2 厘米错误;C 选项 6 厘米...
What are Dimensions in Math? Dimensionis one of the most fundamental concepts of geometry, so fundamental that an adequate axiomatic definition has only been produced in the last century. Intuitively we all understand that the dimension of a point, line (or curve), surface, and solid all diffe...
What does the empty circle mean in math? The line y = 5-7x intersects the unit circle in two places. What are they? What is the radius of the circle with center at (5,-3) and tangent to the line 8 - 2x = 2? A certain circle can be represented by the equation x^2 + y^...
The area of a circle is 36π square meters. What's the radius of the circle? A. 6 meters B. 8 meters C. 10 meters D. 12 meters 相关知识点: 试题来源: 解析 A。本题考查圆的面积公式。圆的面积公式是πr²,已知面积是 36π,那么 r²=36,r=6,所以答案是 A。B 选项不是圆半径的...
What is a Factor in Math? Definition of Factors Factors are numbers which you can multiply together to get another number. For Example :The numbers 2 and 3 are factors of 6 because 2 x 3 = 6. A number can have many factors! Example :2 and 4 are factors of 8, because 4 x 2 =...