Answer:
x=20 degrees
Step-by-step explanation:
Line y is a perpendicular bisector making a 90 degree angle with the base of the triangle. The Interior Angle Sum Theorem states that the sum of the interior angles of a triangle is always equal to 180 degrees. Add 70 to 90
70+90=160 degrees
Subtract the sum from 180
180-160=20 degrees
One x is equal to 20 degrees. Both x's are equal to 40 degrees.
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