Respuesta :

Supplementary angles add up to one hundred eighty (180) degrees, so since you know what angle C is, just subtract that from one hundred eighty (180) and you get one hundred three (103) degrees.

180
- 77
___
103

:D, hope I helped. 

Two angles whose sum is 180° are called supplementary angles. The measure of ∠E is 103°.

What are supplementary angles?

Two angles whose sum is 180° are called supplementary angles. If a straight line is intersected by a line, then there are two angles form on each of the sides of the considered straight line. Those two-two angles are two pairs of supplementary angles. That means, if supplementary angles are aligned adjacent to each other, their exterior sides will make a straight line.

Given that ∠C and ∠E are supplementary. Therefore, the sum of the two angles will be 180°. Now, the sum of the two angles can be written as,

∠C + ∠E = 180°

As it is given that the measure of ∠C is 77°. Therefore, substitute the measure of ∠C,

77° + ∠E = 180°

∠E = 180° - 77°

∠E = 103°

Hence, the measure of ∠E is 103°.

Learn more about Supplementary angle:

https://brainly.com/question/2882938

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