Pre-Assessment Circles

What is the name of the line that goes from one end of the circle to the other and crosses the center point?

• Area

• Diameter

• Circumference

• Radius

The radius is....

• a line that crosses through the center and touches each edge 

• the center point of a circle 

• a line from the center point to the edge of the circle

• an element in science

Find the perimeter of the figure.  Use 3.14 for π!

• 20.57 in.

• 16 in.

• 28.57 in.

• 14.28 in.

What is the area of a quarter circle if the diameter is 14 cm?

• 12.25π cm²

• 49π cm²

• 14π cm²

• 3.5π cm²

If the area of circle is 100π.  Find the radius of the circle.

• 10π

• 10

• 50

• 50π

A circular ground has an area of 144π sq ft. Jenny rides the bike around it. How far does she travel to complete a single round? 

• 72π ft

• 12π ft

• 24π ft

• 6π ft

If the circumference of a circle is 28π, what is the radius of the circle?

• 28

• 14

• 56

• 196

A circular swimming pool is 21 feet in diameter.
How many feet around is the pool? Round to the nearest hundredth!

• 32.99 ft

• 42 ft

• 65.97 ft

• 131.95 ft

If the word problem is asking you to find the space inside the circle, which formula should you use?

• r = d/2

• d = 2r

• C = πd

• A = πr²

If the problem ask you to find the distance around a circle, which formula should you use?

• r = d/2

• d = 2r

• C = πd

• A = πr²