Both angles on the base are 72 which means X=36
Answer:
63+ 2x- 17 = 180 degree
or, 2x+46=180degree
or, 2x=180-46=134degree
or, x = 134÷2=67 degree ans.
2x + 90 + x + 60 - x = 180
2x + 150 = 180
2x = 180 - 150
2x = 30
x = 15
check..
2x = 2(15) = 30
90
15
60 - 15 = 45
30 + 90 + 15 + 45 = 180
180 = 180 (correct)