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Use the diagram and the Exterior Angle Theorem to solve for y.
Y= ______

Use the diagram and the Exterior Angle Theorem to solve for y. Y= ______-example-1
User Hendry Ten
by
7.9k points

1 Answer

6 votes

Hello there!

Answer:

15

Explanation:

According to Exterior Angle Theorem for ∠С in ∆ ABC:

∠BAC + ∠ABC = ∠ACD

(5y + 3)° + (4y + 8)° = 146°

5y + 3 + 4y + 8 = 146

9y + 11 = 146

9y + 11 - 11 = 146 - 11

9y = 135

y = 15

User Dimaaan
by
7.7k points

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