7th Grade Circles Test

Front

What is the formula for the perimeter of a circle?

Back

The perimeter of a circle, also known as the circumference, is calculated using the formula: C = 2πr, where r is the radius of the circle.

Front

How do you calculate the area of a circle?

Back

The area of a circle is calculated using the formula: A = πr², where r is the radius of the circle.

Front

What is the value of π (pi) used in calculations?

Back

π (pi) is approximately 3.14 or can be represented as 22/7.

Front

What is the formula for the area of a rectangle?

Back

The area of a rectangle is calculated using the formula: A = length × width.

Front

What is the formula for the perimeter of a rectangle?

Back

The perimeter of a rectangle is calculated using the formula: P = 2(length + width).

Front

How do you find the area of a square?

Back

The area of a square is calculated using the formula: A = side², where 'side' is the length of one side of the square.

Front

What is the relationship between the diameter and radius of a circle?

Back

The diameter of a circle is twice the length of the radius: D = 2r.

Front

How do you find the area of a shaded region in a composite figure?

Back

To find the area of a shaded region, calculate the area of the larger shape and subtract the area of the unshaded part.

Front

What is the formula for the area of a triangle?

Back

The area of a triangle is calculated using the formula: A = 1/2 × base × height.

Front

What is the difference between perimeter and area?

Back

Perimeter is the total distance around a shape, while area is the amount of space inside a shape.