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20 points and brainliest!!!!

Triangle JKL is equilateral. All three interior angles have equal measures.

What is the measure of exterior angle 1?
30 degrees
60 degrees
120 degrees
130 degrees

20 points and brainliest Triangle JKL is equilateral All three interior angles have equal measures What is the measure of exterior angle 1 30 degrees 60 degrees class=

Respuesta :

Answer:

C. 120º

Step-by-step explanation:

so we know that the inside of a triangle is 180º and since all the measures are the same we can do 180/3 to find how much each angle is.

180/3 = 60º

now we also know that a straight line is equal to 180º and since we already have one angle, all we have to do is subtract 60 from 180.

180 - 60 = 120º

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