Answer:
y = 25°
Explanation:
x = 180° - 115° (115° and x are supplementary angles)
x = 65°
In the triangle,
x + y + 90° = 180°
65° + 90° + y = 180°
155° + y = 180°
Subtract 155 from both sides,
y = 180° - 155° = 25°
y = 25 degrees
straight line has 180 degrees
so 180 - 115 = x which is 65 degrees
traingle has 180 also
65 + 90 = 155 180 - 155 = y which is 25 degrees
The triangle on the other side is the equivalent.
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