ethanw8973
22.07.2020 •
Mathematics
When two parallel lines are cut by a transversal, the alternate exterior angles are Question 15 options: A) supplementary. B) complementary. C) not congruent. D) congruent.
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Ответ:
M<C = 20°
Step-by-step explanation:
Because they’re vertical angles, that means they’re equal to each other so:
m<C = m<D
x = -3x + 80
x + 3x = 80
4x = 80
x = 20
Since m<C equals x, that means m<C is 20°