Circles

Front

What is the measure of the central angles in a circle?

Back

360 degrees

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Front

What is the line segment between the center and a point on the circle called?

Back

Radius

Front

Identify a minor arc in a circle.

Back

BC

Front

What is the longest chord in a circle?

Back

Diameter

Front

What is the term for a line that touches a circle at exactly one point?

Back

Tangent

Front

What is the relationship between the radius and diameter of a circle?

Back

Diameter is twice the radius.

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 5 cm, what is the diameter?

Back

10 cm

Tags

CCSS.7.G.B.4

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 3 cm?

Back

Area = πr² = 28.27 cm² (approximately)

Tags

CCSS.7.G.B.4

Front

What is a semicircle?

Back

An arc that represents half of a circle.