AnswersKY-Geometry B-CRSecants, Tangents, and Angles (Sec 10-5)

Secants, Tangents, and Angles Answers

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Circle O is shown. Secants C A and C E intersect at point C outside of the circle to form an angle with measure 36 degrees. Secant C A intersects the circle at point B, and secant C E intersects the circle at point D. Arc B D is 48 degrees.

Question illustration
A
84°
B
96°
C
120°
D
168°
2
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Circle O is shown. Tangents X Z and Y Z intersect at point Z outside of the circle. The first arc formed is arc b, and the second arc formed is arc a.

Question illustration
A
m∠XZY = (a + b)
Option A
B
m∠XZY = (a – b)
Option B
C
m∠XOY = (a + b)
Option C
D
m∠XOY = (a – b)
Option D
3

A circle is shown. Secant P N and tangent O N intersect at point N outside of the circle to form an angle with a measure of 45 degrees. The measure of arc M O is 83 degrees.

Question illustration
A
128°
B
173°
C
192°
D
256°
4

Circle C is shown. Secants A D and D J intersects at point D outside of the circle. Secant A D intersects the circle at point B and secant D J intersects the circle at point E. Angle D is 37 degrees and the measure of arc B E is 38 degrees. Secants A G and J G intersect at point G outside of the circle. Secant A G intersects the circle at point F and secant J G intersects the circle at point H. Angle G is 32 degrees.

Question illustration
A
31°
B
48°
C
112°
D
121°
5

Circle Y is shown. 2 chords intersect. Angle 1 intercepts an arc with measure 37 degrees. Angle 2 intercepts an arc with measure 25 degrees.

Question illustration
A
B
25°
C
31°
D
37°
6

Circle O is shown. 2 secants intersect at a point outside of the circle to form angle 1. The first arc formed is d, and the second arc formed is b. Arcs a and c are the other 2 arcs outside of the secants.

Question illustration
A
m∠1 = (a – c)
Option A
B
m∠1 = (a + c)
Option B
C
m∠1 = (b – d)
Option C
D
m∠1 = (b + d)
Option D
7

A secant and a tangent meet at a 90° angle outside the circle. What must be the difference between the measures of the intercepted arcs?

A
45°
B
90°
C
180°
D
270°
8

Circle Q is shown. Secant L N and tangent P N intersect at point N outside of the circle. Secant L N intersects the circle at point M. Arc M P is y, arc L P is x, and arc M L is z.

Question illustration
A
m∠MNP = (x – y)
Option A
B
m∠MNP = (x + y)
Option B
C
m∠MNP = (z + y)
Option C
D
m∠MNP = (z – y)
Option D
9

A circle is shown. Secant R T and tangent U T intersect at point T outside of the circle to form an angle with a measure of 21 degrees. Secant R T intersects the circle at point S. Arc R U is 119 degrees.

Question illustration
A
49°
B
77°
C
98°
D
161°
10

Circle Z is shown. Chords A C and B D intersect. The measure of arc C D is 147 degrees and the measure of arc A B is 133 degrees. Angle 2 intercepts the arc with measure 147 degrees. Angle 1 intercepts the arc with measure 133 degrees.

Question illustration
A
70°
B
133°
C
140°
D
147°

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