3 years ago

Determine the measure of the unknown angle in the triangle.

Mathematics

2 answers:

Harlamova29_29 [7]3 years ago

6 0

Answer:

65°

Step-by-step explanation:

Let the unknown angle be ∠ABC

∠ABC + 78° + 37° = 180° (angle sum property of a triangle)

∠ABC + 115° = 180°

∠ABC = 180° - 115°

∠ABC = 65°

∴the unknown angle in the triangle is 65°

daser333 [38]3 years ago

4 0

you add 78 plus 37 then subtract from 180

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