Question

find angle B,C,and angle BAC​

Answer 1

Step-by-step explanation:

Angle lAB=Angle B.........(Vertically opposite angle)

Angle B=40°

Angle C = Angle B(Opposite angle of equal sides)

Angle C=40°

Angle BAC+Angle A+Angle B=180°

Angle BAC+40°+40°=180°

Angle BAC = 180°-80°

Angle BAC = 100°

Answer 2

Answer:

angleA is 100degrees

angleB is 40degrees

angleC is 40degrees

Step-by-step explanation:

angleLAB=40

(VERTICALLY OPPOSITE ANGLES)

angleC=angleB

(EQUAL ANGLES OF ISOSCELES TRIANGLE)

so,

angleA is 180-40-40=180-80

=100