Unit 3 Review

Front

What is the diameter of a circle?

Back

The diameter is twice the radius of the circle.

Front

What formula is used to find the space 'inside' a flat object?

Back

Area is the formula used to find the space inside a flat object.

Front

How do you calculate the circumference of a circle?

Back

Circumference can be calculated using the formula C = 2πr, where r is the radius.

Front

What is the relationship between diameter and radius?

Back

The diameter of a circle is twice the radius.

Front

What is the circumference of a circle with a diameter of 16 cm?

Back

The circumference is 50.24 cm.

Front

If a DVD has a diameter of 15 millimeters, what equation helps determine the circumference?

Back

The equation is C = 15π.

Front

What is the formula for calculating the area of a circle?

Back

The area of a circle is calculated using the formula A = πr².

Front

What is the value of π (Pi) approximately?

Back

π is approximately 3.14.

Front

What is the circumference of a circle with a radius of 8 cm?

Back

The circumference is 50.24 cm.

Front

What is the area of a circle with a radius of 5 cm?

Back

The area is approximately 78.5 cm².