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Rama09 [41]
3 years ago
8

What is the measure of angle ACB?

Mathematics
2 answers:
S_A_V [24]3 years ago
6 0
<ACB = 1/2(100 - 42)
<ACB = 1/2(58)
<ACB = 29

answer is A. 29
Nataliya [291]3 years ago
4 0

Answer:

The correct option is B.

Step-by-step explanation:

From the given graph it is clear that the measure of arc AB is 100°.

Let the center of circle of the circle be O.

According to the central angle theorem, the angled inscribed on a circle is half of its central angle.

Using central angle theorem,

\angle ABX=\frac{1}{2}\times \angle AOX

42^{\circ}=\frac{1}{2}\times \angle AOX

Multiply 2 on both the sides.

42^{\circ}\times 2=\angle AOX

84^{\circ}=\angle AOX

The central angle of arc AX is 84°. So the measure of arc AX is 84°.

Using tangent secant theorem,

\text{Angle between tangent and secant}=\frac{1}{2}(\text{Major arc - Minor arc})

\angle ACB=\frac{1}{2}(Arc(AB)-Arc(AX))

\angle ACB=\frac{1}{2}(100^{\circ}-84^{\circ})

\angle ACB=\frac{1}{2}(16^{\circ})

\angle ACB=8^{\circ}

Therefore the measure of angle ACB is 8° Therefore the correct option is B.

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