Week 13 Test

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where C is the circumference and r is the radius.

Front

How do you calculate the area of a circle?

Back

A = πr², where A is the area and r is the radius.

Front

What is a secant line in relation to a circle?

Back

A secant line is a line that intersects a circle at two points.

Front

What is the relationship between the arc length and the radius of a circle?

Back

Arc length (s) can be calculated using the formula s = rθ, where θ is in radians.

Front

How do you find the area of a sector of a circle?

Back

Area of a sector = (θ/360) * πr², where θ is the central angle in degrees.

Front

What is the measure of a full circle in degrees?

Back

A full circle measures 360 degrees.

Front

What is the measure of a full circle in radians?

Back

A full circle measures 2π radians.

Front

How do you convert degrees to radians?

Back

To convert degrees to radians, multiply by π/180.

Front

What is the formula for the area of a sector in terms of radians?

Back

Area of a sector = (1/2) * r² * θ, where θ is in radians.

Front

What is the relationship between the central angle and the arc length?

Back

The arc length is directly proportional to the central angle.