Question

in triangle abc, ab=ac and angle b=70.find angle a degree?

Answer 1

Since ab=ac it is an iscosceles triangle

angle b = angle c = 70 degree ( since angles opposite to equal sides are also equal)

a+b+c=180 (by angle sum property of triangle)
70+70+a=180
a=180-140
a=40

angle a is of 40 degree

(Draw a figure and it will be easy to understand.)

Answer 2

Answer:

• Angle a is 40°.

Hope it will be helpful ✌️