MA.7.GR.1.3 & 1.4

Front

What is the formula to find the area of a circle?

Back

Area = π × r², where r is the radius.

Front

What is the value of π (pi) approximately?

Back

π is approximately 3.14.

Front

If a circle has a radius of 5 cm, what is its area?

Back

Area = π × (5 cm)² = 78.5 cm².

Front

What is the formula to find the circumference of a circle?

Back

Circumference = 2 × π × r, where r is the radius.

Front

If a circle has a diameter of 10 cm, what is its radius?

Back

Radius = Diameter / 2 = 10 cm / 2 = 5 cm.

Front

What does circumference mean?

Back

Circumference is the distance around a circle.

Front

How do you convert diameter to radius?

Back

Divide the diameter by 2.

Front

What is the area of a circle with a radius of 3 cm?

Back

Area = π × (3 cm)² = 28.26 cm².

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the length of the radius.

Front

If the area of a circle is 154 cm², what is the radius?

Back

Radius = √(Area/π) = √(154/π) ≈ 7 cm.