Search 74,114 tutors
FIND TUTORS
Ask a question
0 0

Find the measure of second and third angles

Tutors, please sign in to answer this question.

2 Answers

Hi Chris;
FIRST...50
SECOND...x+30
THIRD...x
TOTAL...180
You probably already know that the total degrees of all angles of a triangle is 180.
180=(50)+(x+30)+(x)
180=50+x+30+x
Let's combine like terms...
180=80+2x
Let's subtract 80 from both sides as we proceed to isolate x...
-80+180=80+2x-80
100=2x
Let's divide both sides by 2...
100/2=(2x)/2
50=x
THIRD...50
SECOND...50+30=80
FIRST...50
Let's check our work...
180=50+80+50
180=180

Woodbridge Geometry tutors