Question

answer my question fast

Answer 1

Let the base angles be x
vertical angle=x+15
x+x+x+15= 180 ( angle sum property)
3x+15=180
3x=180-15
3x= 165
x=165/3
x=55

Therefore the angles are
55°, 55° ( base angles) and 70°( vertical angle).

Answer 2

Let the base angles be x degree each
then the vertical angle is (x+15) degree...
now,
x+x+x+15=180
or, 3x+15=180
or, 3x=165
x=165/3
or, x=55
therefore, base angles each =55degree
vertical angle =55+15=70degree....