Question

please explain it correctly can't understand​

Answer 1

15)a) angle x = 40 degree angle ( Isosceles triangle property)

so x is equal to forty degrees

15)b) angle x = angle beside 120 degree( Isosceles triangle property)

now

we can say that angle x + 120 degree angle = 180 degree ( linear pair)

so x=180-120=60 degree

15)c)we can say that

90 degree angle +angle x= 125 degree(exterior angle property)

so angle x = 125-90= 35 degree