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kari74 [83]
3 years ago
12

Point C is the center of the circle. The measure of angle ACB is 3x + 120. Arc AB measures 65x – 4. Find the measure of arc AB.

Mathematics
2 answers:
diamong [38]3 years ago
7 0

Answer:

The measure of arc AB is 126°.

Step-by-step explanation:

It is given that point C is the center of the circle. The measure of angle ACB is 3x + 120. Arc AB measures 65x – 4.

The measure of central angle is equal to the measure of arc.

3x+120=65x-4

Solve this equation for x.

120+4=65x-3x

124=62x

Divide both the sides by 62.

\frac{124}{62}=x

2=x

The value of x is 2.

The measure of arc AB is

65x-4=65(2)-4\Rightarrow 130-4=126

Therefore the he measure of arc AB is 126°.

katovenus [111]3 years ago
5 0
In a circle The measurement of a CENTRAL ANGLE (vertex C) is equal to the measurement of the arc intercepted:

65x-4 = 3x+120 ===> 62x=124 & x= 2, hence the arc = 2
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