Tangents Chords and Secants Arc Measures

It is half a circle and its endpoints are those of a diameter of the circle.

• Semicircle

• Major Arc

• Minor Arc

• Chimera Arc

The measure of these arcs are always less than 180°.

• Central Angle

• Major Arc

• Minor Arc

• Semicircle

an angle whose vertex is on the circle

• angle

• obtuse angle

• intercepted arc

• inscribed angle

Find the measure of the arc indicated

• 80

• 40

• 120

• 60

What is the value of x?

• 22

• 25

• 15

• 20

Find x.

• 120

• 60

• 30

• 240

Find x.

• 60

• 40

• 50

• 30

If two secants intersect in the interior of a circle, then the measure of each angle formed is half the _____ of the measures of the intercepted arcs. (Theorem 7.6B)

• result

• sum

• difference

• product

A(n) _____ angle is an angle whose vertex is a point on a circle and whose sides are two chords of the circle.

• acute

• obtuse

• inscribed

• intercepted

The measure of an inscribed angle is _____ the measure of its intercepted arc.

• half

• equal to

• one-fourth

• twice