Arthur D. answered • 09/25/18

Tutor

4.9
(107)
Forty Year Educator: Classroom, Summer School, Substitute, Tutor

x=base angle

(1/2)x+5=vertex angle

x+x+(1/2)x+5=180

2.5x=175

25x=1750

x=1750/25

x=70º for each base angle

(1/2)(70)+5=35+5=40º for the vertex angle