9.1 to 9.3 Circle Properties Practice

Front

What is the measure of angle XNM if it is inscribed in a circle and subtends an arc of 80 degrees?

Back

40 degrees

Front

A tangent to a circle is ________________________ to the radius drawn to the point of tangency.

Back

perpendicular

Front

Two tangents of a circle that meet outside of the circle at one point are _________.

Back

congruent

Front

What is the name of the angle formed by two chords that intersect inside a circle?

Back

Inscribed angle

Front

What is the relationship between the central angle and the inscribed angle that subtend the same arc?

Back

The central angle is twice the inscribed angle.

Front

If a circle has a radius of 10 cm, what is the length of a tangent drawn from a point 10 cm away from the center of the circle?

Back

10 cm

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.

Front

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

Back

154 cm² (Area = πr²)

Front

What do you call a line segment that connects two points on a circle?

Back

Chord

Front

What is the measure of an angle formed by two tangents drawn from a point outside the circle?

Back

The angle is equal to half the difference of the measures of the intercepted arcs.