High School · Circles

CCSS.MATH.CONTENT.HSG.C.A.1

Prove that all circles are similar.

Read this standard on the official Common Core site

Lessons that teach this standard

• Arc Length, Sector Area and Radian Measure

  Why all circles are similar, why an arc's length is proportional to its radius, how that ratio defines the radian, and the formulas for arc length and sector area.