Chapter 8 review

Front

What is the formula for the area of a circle?

Back

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

Front

How do you calculate the perimeter of a rectangle?

Back

Perimeter = 2(length + width).

Front

What is the value of π (pi) to two decimal places?

Back

π ≈ 3.14.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

How do you find the perimeter of a circle?

Back

Perimeter (Circumference) = 2πr, where r is the radius.

Front

What is the formula for the area of a semi-circle?

Back

Area = (1/2)πr², where r is the radius.

Front

How do you calculate the area of a triangle?

Back

Area = (1/2) × base × height.

Front

What is the perimeter of a semi-circle with a diameter of 10 yards?

Back

Perimeter = (1/2) × πd + d = (1/2) × π(10) + 10 = 15.71 yards.

Front

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

Back

Area = π(7)² = 153.94 cm².

Front

How do you find the area of a shape composed of multiple rectangles?

Back

Calculate the area of each rectangle and sum them up.