Math 6: Area, Perimeter, & Circles

A line that goes from one end of the circle to the other and crosses the center point.  

• center
• diameter
• dime eater
• radius

What is the formula for area of a circle?

• A = π×r²
• A = 2×π×r

What is the radius of this circle?

• 18 in
• 10 in
• 9 in
• 8 in

What is the diameter of this circle?

• 3.5 m
• 3 m
• 5 m
• 7 m

What is the circumference of this circle ? Use 3.14 for pi.

• 3.14 cm 
• 37.68 cm
• 24 cm
• 68.4 cm

Find the area of the circle below. Use 3.14 for pi.

• 100 cm²
• 225 cm²
• 9 cm²
• 28.26 cm²

Find the area of the circle. Use 3.14 for pi.

• 56.52 in²
• 254.34 in²
• 1017.36 in²
• 113.04 in²

Daniel wants to buy cookies for his friend. The radius of a cookie is 5 inches. What is the cookie’s  circumference? Use 3.14 for pi.

• 10 in
• 2.5 in
• 15.7 in
• 31.4 in 

The distance around an object is called the 

• area
• perimeter

What is the perimeter?

• 3
• 6
• 12
• 18