Vocab
Radius/Diameter
Working Backwards
Circumference
Area
100

The center of the circle? 

Center Point 

100

If a circles radius was 12.7cm what is the diameter

25.4

100

Area is 452.16 squared units. What is the radius? What is the diameter?

R: 12 and  D: 24

100

The diameter is 10 inches. What is the circumference?

31.4

100

The radius is 4 inches. What is the area of the circle?

50.24 square inches 

200

What number is pi ?

3.14

200

If a circles diameter is 18in what is the radius 

9in

200

The circumference of a circle is 100.794? What is the radius?

R: 16.05

200

The diameter is 42 centimeters long what’s the circumference 

131.88. Centimeters 

200

If the radius is 12 what is the area?

452.16

300

What does the diameter go through ?

side to center to the other side

300

If a circles diameter is 120cm what is the radius?

60cm

300

If you have a semi-circle with a diameter of 12in. What is the perimeter?

30.84in

300

Angelica says the circumference is 308.08 The problem was (if the diameter is 98.12 What is the circumference?) is she correct?

Yes, she is correct 

300

If the radius of a circle is 14.5 .what is the area? 

660.185

400

What do you need for circumference?

Diameter X pi

400

If the diameter of a circle is 50.2 in what’s the radius?

25.1 in

400

What is the diameter 523pi?

523

400

If a circles diameter is 412 meters long what’s the circumference?

1293.63 meters long

400

Estella says the area of her friend’s circle is 490.63cm ms Lori says the area of the circle is 590.45 Who’s right this is the problem (the radius is 12.5)

Estella is right 

500

What is another word for circumference?

Perimeter 

500

If the diameter is 101.9m what is the radius?

50.95m

500

If a circles circumference is 366, what is the diameter 

116.56

500

If the radius is 6 what is the circumference 

37.68

500

The diameter of a circle is 85.96 what is the area?

5800.46

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