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How to calculate area in math?

How to Calculate Area. 1 Square Area Formula. A = a2 A = a × a a = edge length. 2 Rectangle Area Formula. 3 Border Area Formula. 4 Trapezoid Area Formula. 5 Parallelogram Area Formula. More items

How do you find the area of a cricle?

Task 1: Given the radius of a cricle, find its area. For example, if the radius is 5 inches, then using the first area formula calculate π x 5 2 = 3.14159 x 25 = 78.54 sq in. Task 2: Find the area of a circle given its diameter is 12 cm. Apply the second equation to get π x (12 / 2) 2 = 3.14159 x 36 = 113.1 cm 2 (square centimeters).

How to find the area of a circle given its diameter?

For example, if the radius is 5 inches, then using the first area formula calculate π x 5 2 = 3.14159 x 25 = 78.54 sq in. Task 2: Find the area of a circle given its diameter is 12 cm. Apply the second equation to get π x (12 / 2) 2 = 3.14159 x 36 = 113.1 cm 2 (square centimeters).

How do you calculate the area of a right triangle?

For right-angled triangles you can calculate the area by knowing the hypothenuse and the height towards it. All of these are supported by this online area calculator. The formula for the area of a circle is 2 x π x radius, but the diameter of the circle is d = 2 x r, so another way to write it is 2 x π x (diameter / 2).


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