Question

The sum of the measures of two exterior angles of a triangle is 260. What is the measure of the third exterior angle? Can you show me how to do this?

Answer 1

The exterior angles of a triangle will always add up to 360.

Answer 2

ah i see thanks

Answer 3

No worries :)

Answer 4

So the third would be 100?

Answer 5

Yep :)

Answer 6

A+B+C=180
A+a+B+b+C+c=180+180+180=540
a+b+c=540-(A+B+C)=360
a+b=260, given
c=100