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Unit 4B - Circles - Math 7

DEFINITION: a line that goes from the center of the circle to any point on the circle

FORMULA: Radius = Diameter divided by 2

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Unit 4B - Circles - Math 7

RADIUS

DEFINITION: A straight line that goes from one side of a circle to the opposite side AND through the center of the circle.

FORMULA: Diameter = Radius x 2

Unit 4B - Circles - Math 7

​DIAMETER

Unit 4B - Circles - Math 7

CIRCUMFERENCE

DEFINITION: a ratio between the circumference and the diameter of a circle. It is approximately 3.14

FORMULA: Circumference divided by diameter

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Unit 4B - Circles - Math 7

Lesson Complete!

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Unit 4B - Circles - Math 7