Module 1 Topic 1 Lesson 2

Front

What is the formula for the area of a circle?

Back

Area = π × r², where r is the radius.

Front

How do you calculate the radius from the diameter?

Back

Radius = Diameter ÷ 2.

Front

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

Back

π (pi) is approximately 3.14.

Front

If the radius of a circle is 1.5 ft, what is the area?

Back

Area = 3.14 × (1.5)² = 7.07 ft².

Front

If the diameter of a circle is 8.8 yd, what is the radius?

Back

Radius = 8.8 yd ÷ 2 = 4.4 yd.

Front

What is the area of a circle with a radius of 10 in?

Back

Area = 3.14 × (10)² = 314 in².

Front

If the diameter of a circle is 8 in, what is the area?

Back

Radius = 8 in ÷ 2 = 4 in; Area = 3.14 × (4)² = 50.24 in².

Front

What is the area of a circle with a diameter of 1.5 in?

Back

Radius = 1.5 in ÷ 2 = 0.75 in; Area = 3.14 × (0.75)² = 1.77 in².

Front

What does rounding to the nearest hundredth mean?

Back

It means to round the number to two decimal places.

Front

How do you convert the diameter to radius for area calculation?

Back

Divide the diameter by 2 to find the radius.