So if you want to find the answer you would find it by doing it yourself
Answer:
C; right answer on Khan Academy
Step-by-step explanation:
You can prove it by the SAS postulate which should be the first option
Hi there!
There are many ways to find the measure of an exterior angle of a triangle. I'll explain the easiest method to you. As you can see in the image, a line is drawn extending a side of the triangle. In order to find the measure of the exterior angle, we can subtract the measure of the
adjacent interior angle from 180 (a straight angle). Doing this subtraction will give us the measure of the exterior angle.
Hope this helps!! :)
D) 3x+6
x + 1 + 2x +5
That will = D