Answer:
x=13
Step-by-step explanation:
For isosceles triangle the bottom angles are equal to each other.
and for all triangle the sum of the angles is 180.
- SO from this we can say that the bottom angles are equal to:
180(the sum of the angles)-102(the top angle)=78
- so because they are equal we divide 78 by 2 to get the value of one angle:
78÷2=39
- from this we can say that:
3x=39
3x=39
(divide 3 for both sides)
x=13
extra information:
y+7=39
y=32
