Chapter 8 review

Front

What is the formula for calculating the perimeter of a rectangle?

Back

Perimeter = 2(length + width)

Front

How do you calculate the area of a rectangle?

Back

Area = length × width

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2 × π × radius

Front

How do you find the area of a circle?

Back

Area = π × radius²

Front

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

Back

Perimeter = π × radius + 2 × radius

Front

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

Back

π ≈ 3.14

Front

How do you calculate the area of a triangle?

Back

Area = 1/2 × base × height

Front

What is the formula for the area of a trapezoid?

Back

Area = 1/2 × (base1 + base2) × height

Front

What is the difference between perimeter and area?

Back

Perimeter is the distance around a shape; area is the space inside a shape.

Front

How do you convert square inches to square feet?

Back

Divide the number of square inches by 144.