4 years ago

What expression represents the measure of angle x?

1 answer:

5 0

An isosceles triangle is a triangle that has 2 equal sides and 2 equal angles.

side XY = side XZ
∠Y = ∠Z
Since ∠Y = a° then ∠Z = a°

Because interior angles of a triangle sum up to 180°, we simply need to find the difference between 180° and the 2 known angles to solve for the measure of angle X.

∠X = 180° - 2a°

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