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HELP WILL MARK BRAINLIEST!!!!!!!!
Three angles in a quadrilateral measure 31º, 83º, and 146º. What is the measure of the fourth angle?

A. 82º


B. 97º


C. 100º


D. 112º

Respuesta :

leeyah188
You'd need to know the degrees of a quadrilateral which is, 360 degrees.

I'm going to represent x as the degrees we need to find:

31+83+146+x=360
 
*add like terms*

260+x=360
x=100

The degrees of the angle is 100 degrees. Therefore, your answer is choice C.


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