Open Up Grade 7 Unit 3 Post Test

Front

What is the radius of a circle?

Back

A line from the center point to the edge of the circle.

Front

How do you find the area of a circle?

Back

Use the formula A = πr², where r is the radius.

Front

What is the value of π (Pi) approximately?

Back

3.14

Front

If the radius of a circle is 3 cm, what is the area?

Back

28.26 cm².

Front

What is the constant of proportionality in the equation y = 14x?

Back

14.

Front

What is the formula for the area of a circle?

Back

A = πr².

Front

If the radius of a circle is 9, what is the area?

Back

153.86.

Front

What does the term 'proportionality' mean in mathematics?

Back

It refers to the relationship between two quantities where one is a constant multiple of the other.

Front

What is the diameter of a circle?

Back

A line that crosses through the center and touches each edge.

Front

How do you calculate the area of a circle with a radius of 10 cm?

Back

A = π(10)² = 314 cm².