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liq [111]
3 years ago
6

-50 Points- If segment AC and segment BC are tangent to circle O, find the value of x.

Mathematics
2 answers:
Shkiper50 [21]3 years ago
4 0

Answer:

x = 170 deg

Step-by-step explanation:

A tangent to a circle is perpendicular to the radius of the circle at the point of tangency. That means that in quadrilateral AOBC, angles A and B are right angles and measure 90 deg.

The sum of the measures of the angles of an n-sided polygon is

(n - 2)180 deg

In this case, n = 4, so

(4 - 2)180 deg = 360 deg

m<A + m<O + m<B + m<C = 360

90 + x + 90 + 10 = 360

x + 190 = 360

x = 170

Answer: 170 deg

erik [133]3 years ago
3 0

AOB ( x)  + ACB = 180

AOB (x) + 10 = 180

x = 180-10

x = 170

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