CRC.7

What is the measure of an angle formed by a tangent and a chord in a circle?

• Always 90 degrees

• Equal to half the measure of the intercepted arc

• Dependent on the length of the chord

• Equal to the radius of the circle

If two chords in a circle are congruent, what can you conclude about the arcs they intercept?

• The arcs they intercept are perpendicular.

• The arcs they intercept are equal in length.

• The arcs they intercept are congruent.

• The arcs they intercept are parallel.

What is the measure of an angle formed by two chords in a circle that intersect inside the circle?

• Half the sum of the measures of the arcs intercepted by the angle and its vertical angle

• Half the difference of the measures of the arcs intercepted by the angle and its vertical angle

• Equal to the measure of the intercepted arc

• Twice the sum of the measures of the arcs intercepted by the angle and its vertical angle

If the measure of an inscribed angle in a circle is 90 degrees, what is the measure of the central angle subtending the same arc?

• 180 degrees

• 270 degrees

• 45 degrees

• 120 degrees

What is the measure of an angle formed by two secants intersecting outside a circle?

• Double the difference of the intercepted arcs

• Sum of the intercepted arcs

• Half the difference of the intercepted arcs

• Product of the intercepted arcs

In a circle with a radius of 10 cm, what is the length of a chord that is 8 cm away from the center of the circle?

• 15 cm

• 20 cm

• 12 cm

• 6 cm

What is the measure of an angle formed by a chord and a tangent in a circle?

• Equal to the measure of the intercepted arc by the chord

• Twice the measure of the intercepted arc by the chord

• The sum of the measures of the intercepted arc by the chord and the arc opposite the tangent

• Half the measure of the intercepted arc by the chord

If the measure of an angle formed by two secants intersecting outside a circle is 120 degrees, what is the measure of the arc they intercept?

• 30 degrees

• 60 degrees

• 45 degrees

• 90 degrees

If the measure of an inscribed angle in a circle is 60 degrees, what is the measure of the central angle subtending the same arc?

• 90 degrees

• 30 degrees

• 120 degrees

• 150 degrees

How long is the diameter of a circle if its radius is 8 cm?

• 4 cm

• 8 cm

• 16 cm

• 32 cm