Question

ABC is an isosceles triangle in which ab=ac. If angle a=40 then find the value of x and y.​

Answer 1

Answer:

x=70 and y=70

Step-by-step explanation:

because base angle of isosceles triangle is equal.Sum of all angle of triangle in 180°

Answer 2

$in \: triangle \: abc \: \\ angle \: a \: = 40 \\ angle \: b \: = x \\ angle \: c \: = y \\ x = y(angle \: of \: equal \: and \: opposite \: sides)\\ angle \: a + angle \: b + angle \: c = 180(angle \: sum \: property \: of \: triangle) \\ 40 + x + y = 180 \\ 40 + x + x = 180(x = y) \\ 40 + 2x = 180 \\ 2x = 180 - 40 \\ x = \frac{140}{2} \\ x = 70 \\ y = 70$

please mark as brainialist!!