AREA AND CIRCUMFERENCE

DEFINITION

100

DEFINE GEOMETRY

STUDY OF SHAPES

(ANSWERS MAY VARY)

200

DEFINE CIRCUMFERENCE

the enclosing boundary of a curved geometric figure, especially a circle (answers may vary)

300

Define Area 

the enclosing boundary of a curved geometric figure, especially a circle (Answers may vary

400

DEFINE DIAMETER 

a straight line passing from side to side through the center of a body or figure, especially a circle or sphere. (answers may vary

500

DEFINE RADIUS

a straight line from the center to the circumference of a circle or sphere. 

(ANSWERS MAY VARY

WORD PROBLEM

100

A cleaning person carries a large key ring. The key ring has a diameter of 6 inches. What is the key ring's circumference?

18.84

200

Elise measures a circular magnet and calculates that it has a circumference of 6.28 inches. What is the magnet's diameter?

2

300

A subway token has a radius of 1 centimeter. What is the token's diameter

2

400

When Laura won a contest, she got a gold medal with a diameter of 8 centimeters. What is the medal's radius?

4

500

A cathedral has a large, circular stained-glass window. A visitor measures the window and calculates that it has a circumference of 18.84 feet. What is the window's radius?

3

CIRCLE FORMULA

100

RADIUS*2

DIAMETER

200

DIAMETER/2

RADIUS

300

WHAT IS THE VALUE OF PI

3.14

400

2*PI*RADIUS

CIRCUMFRENCE

500

PI*RADIUS SQUARED

AREA

FIND CIRCUMFERENCE

100

IF THE RADIUS IS 2 WHAT is THE CIRCUMFERENCE

12.56

200

IF THE RADIUS IS 10 WHAT IS THE CIRCUMFRENCE

62.8

300

IF THE RADIUS IS 13 WHAT IS THE DIAMETER

81.64

400

IF THE DIAMETER IS 22 WHAT IS THE CIRCUMFERENCE

69.08

500

IF THE DIAMETER IS 43 WHAT IS THE CIRCUMFERENCE 

135.02

FIND AREA

100

IF THE RADIUS IS 3 WHAT IS THE AREA

28.23²

200

IF THE RADIUS IS 7 WHAT IS THE AREA

153.86²

300

IF THE RADIUS IS 63 WHAT IS THE DIAMETER

11,683.94²

400

IF THE DIAMETER IS 10 WHAT IS THE AREA 

78.5²

500

IF THE DIAMETER IS 27 WHAT IS THE AREA

572.265²