Area Of Shapes

Front

What is the formula to find the area of a circle?

Back

A = πr², where r is the radius of the circle.

Front

What is the difference between a radius and a diameter?

Back

The radius is half the length of the diameter. The diameter is the longest distance across the circle, passing through the center.

Front

How do you calculate the area of a trapezoid?

Back

A = ½(h)(a + b), where h is the height, and a and b are the lengths of the two parallel sides.

Front

What is the area of a trapezoid with bases 10 m and 14 m, and height 6 m?

Back

A = ½(6)(10 + 14) = 72 m².

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

If the diameter of a circle is 20 ft, what is the radius?

Back

The radius is 10 ft, since the radius is half of the diameter.

Front

What is the area of a circle with a radius of 7 cm?

Back

A = π(7)² ≈ 154 cm².

Front

What is the area of a rectangle with a length of 5 m and a width of 3 m?

Back

A = length × width = 5 m × 3 m = 15 m².

Front

What is the area of a square with a side length of 4 cm?

Back

A = side² = 4 cm × 4 cm = 16 cm².

Front

How do you find the area of a triangle?

Back

A = ½(base)(height).