Vocabulary
Radius
Diameter
Circumference
Miscellaneous
100

What is the name of a line or line segment that goes from one edge of a circle to another edge, passing through the center of the circle?

A Diameter

100

Draw a picture of a circle with the radius labeled.

Check answers on whiteboard

100
Lexi had a new circular pool installed in her backyard. If she walks from the edge of the pool to the middle, she walks 12.5 feet. What is the diameter of the pool?
25 feet
100
Joshua has a round table with a diameter of 5 feet. What is the distance around the outside of the table?
15.7 feet
100
If you take the distance around the outside of every circle and divide by the diameter, what number will you always get?
Pi (3.141592653...)
200
What is the name of a line or line segment that goes from the edge of a circle to the middle?
A Radius
200
The diameter of a circle is 10cm. What is the radius of the circle?
5cm
200
If Jessicca drew a perfect circle with a radius of 4.5cm, what would the diameter of that circle be?
9 cm
200
What is the formula for finding circumference in a circle?
C=pi x d or C=pi x r x 2 Where pi=3.14
200
What do you call the tool we used to create perfect circles?
A compass.
300

The number 3.14159

Pi

300

If Dominic cut down a tree with a diameter of 7 meters, what would the radius of the tree be?

3.5 meters

300
The radius of the circle at half-court in IHE's gym has a radius of 147cm. What is the diameter of that circle?
294 cm
300
Ms. Yoder has a plate with a diameter of 12 inches. What is the circumference of that plate?
37.68 inches
300
From what language do we get the term 'pi'?
Greek
400
What do we call the distance around the outside of a circle?
The circumference.
400
Aliens landed in Roswell and created a circle in the ground that was 56 meters across. What would the radius of that circle be?
28 meters
400
Mr. Farver's dog has a water bowl that has a circumference of 31.40 inches. What is the diameter of the bowl?
10 inches
400
Anthony bought a large 18 inch pizza at Big Cheese. What is the distance around the outside of the pizza?
56.52 inches
400

How many degrees does a circle measure?

360

500

The total amount of space inside of a circle

Area

500

The diameter of this circle is 0.750

0.375

500
Mr. Donkersloot has a clock with a minute had that goes from the middle of the clock to the edge. The minute hand is 16cm long. What is the diameter of the clock?
32 cm
500
Hunter bought new tires for his 4 wheeler. The radius of the tire is 18 inches. What is the circumference of the tire?
113.04 inches
500
**REVIEW** Solve this problem: 15÷ (2+1) + 36 ÷ 6 x 4
29 (PEMDAS!)
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