Need Help Please answer and Find the measure of the exterior angle of the triangle.

Mathematics

2 answers:

natta225 [31]3 years ago

5 0

Answer:

y°=70

Step-by-step explanation:

the angles inside a triangle must add up to 180 degrees, and thus the unknown interior angle is 180°-40°-30°=110°

this interior angle and the exterior angle are supplementary to each other and thus 110°+y°=180°

so y°=70°

you could also have used the theorem that states that the interior angles sum not adjacent to the exterior angle would equal the exterior angle

Mrac [35]3 years ago

3 0

Answer:

Step-by-step explanation:

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