Understanding Circles for Grade 7

Front

Radius

Back

from the center to any point on the circle

Front

Diameter

Back

line segment passing through the center, connecting two points on the circle

Front

Relationship between diameter and radius

Back

= 2 × Radius

Front

Circumference formula

Back

latex="C = 2\pi r">

Front

Area formula

Back

latex="A = \pi r^2">

Front

Back

3.14...