Circle Properties

Front

What is the measure of angle ABD if it is given that it equals 51 degrees?

Back

Angle ABD = 51 degrees.

Front

A line in the same plane as a circle that intersects the circle at exactly one point is called a ____________.

Back

Tangent.

Front

In a right triangle formed by a tangent and a line drawn to the point of tangency, if the hypotenuse is 15, what is the length of the hypotenuse?

Back

Hypotenuse = 15.

Front

How many degrees are in a semicircle?

Back

180 degrees.

Front

If angle a is 93 degrees and angle b is 74 degrees, what are the measures of angles a and b?

Back

a = 93 degrees, b = 74 degrees.

Front

What is a chord in a circle?

Back

A chord is a line segment with both endpoints on the circle.

Front

Define 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 radius and the diameter of a circle?

Back

The diameter is twice the length of the radius.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is the area of a circle with a radius of 7 units?

Back

Area = πr² = π(7)² = 49π square units.