Triangles vertex angle 5y+3 base angle 4y+8 and exterior angle 146? Find the measure of
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Step-by-step explanation:
Because the interior angles of a triangle add to 180°, and angles c+d also add to 180°:
The interior angles of a triangle add to 180°:a + b + c = 180°
Angles c and d make a straight angle, which is 180°:d + c = 180°
So d + c equals a + b + c:d + c = a + b + c.
- Subtract c from both sides:d = a + b.
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