Applying the definition of congruent triangles, the value of y in the triangles shown is: 6.5
What are Congruent Triangles?
Congruent triangles have pairs of sides and angles that are of the same measure.
The triangles in the image are congruent. Therefore, we will have:
3y - 8.5 = y + 4.5
Combine like terms
3y - y = 8.5 + 4.5
2y = 13.0
y = 6.5
Learn more about congruent angles on:
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