Question

Find the value of x.

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Answer 1

30

Explanation:

since the 2 sides are congruent, the two angles are congruent, so

75+75+ x= 180

150+x=180

x=30

Answer 2

30

Explanation:

Remark

The angle that looks like a shark's fin sticking out of the water is also 75o. So you have 2 angles that are 75 degrees each. Add them together.

Solution

x + 75 + 75 = 180 All triangles have 180 degrees.

x + 150 = 180 Subtract 150 from both sides.

x= 180 - 150

x = 30