Plane Geometry Review

Front

What is the circumference of a circle?

Back

The circumference of a circle is the distance around it, calculated using the formula C = 2πr, where r is the radius.

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

How do you find the radius of a circle if you know the circumference?

Back

To find the radius from the circumference, use the formula r = C / (2π).

Front

What is the area of a circle?

Back

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

Front

If a rectangle has an area of 24 square feet and one side is 6 feet long, what is the length of the other side?

Back

The length of the other side is 4 feet.

Front

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

Back

The diameter is twice the radius, or d = 2r.

Front

What is the formula for the circumference of a circle with a diameter?

Back

The circumference can also be calculated using the formula C = πd, where d is the diameter.

Front

How do you calculate 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 formula for the perimeter of a rectangle?

Back

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

Front

What is the value of π (pi) approximately?

Back

π (pi) is approximately 3.14.