Question

In △ABC, ∠A:∠B:∠C=3:4:11. Find the measure of the exterior angle at C.
Let the angles be 3x, 4x, and 11x
Then, 3x+4x+11x=
⇒ x =
Now find ∠C and the exterior angle at C.

Answer 1

Answer:

angle C= 110⁰

exterior angle of C = 180-110

= 70⁰

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