IM Geometry Unit 7 Circles review

Front

What is the formula for arc length in a circle?

Back

Arc Length = (θ/360) × 2πr, where θ is the angle in degrees and r is the radius.

Front

What is the formula for the area of a sector in a circle?

Back

Area of Sector = (θ/360) × πr², where θ is the angle in degrees and r is the radius.

Front

How do you convert degrees to radians?

Back

Radians = Degrees × (π/180).

Front

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

Back

The diameter is twice the radius (d = 2r).

Front

What is the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is the area of a circle?

Back

Area = πr², where r is the radius.

Front

What is the measure of a right angle in degrees?

Back

90 degrees.

Front

What is the measure of a straight angle in degrees?

Back

180 degrees.

Front

What is the relationship between the central angle and the inscribed angle in a circle?

Back

The central angle is twice the measure of the inscribed angle that subtends the same arc.

Front

What is the formula for converting radians to degrees?

Back

Degrees = Radians × (180/π).