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In triangle ABC, the measure of angle ABC is 42 degrees and the measure of angle BAC is 64. What is the measure of angle BCA? Write an expression to find the measure of angle BCA.

In triangle ABC the measure of angle ABC is 42 degrees and the measure of angle BAC is 64 What is the measure of angle BCA Write an expression to find the measu class=

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semsee45

Answer:

Step-by-step explanation:

The sum of interior angles of a triangle = 180°

Therefore,  ∠ABC + ∠BAC + ∠BCA = 180°

                          ⇒ 42 + 64 + ∠BCA = 180°

                                           ⇒ ∠BCA = 180 - 42 - 64

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