Question

1. In triangleABC, if AB=AC and angleA = 100, then
find angleB and angleC​

Answer 1

the triangle is isoceles so angles opposite to opposite sides are equal

a=b=40

Answer 2

Answer:

∠B=∠C=40°

Step-by-step explanation:

Given: in triangle ABC, AB=AC

∠ACB=∠ABC (Angle opposite to equal sides are equal)

Let them be '$x$'

Now in Triangle ABC, By Angle Sum Property

∠BAC +∠ACB+∠ABC=180°

100°+$x$+$x$=180°

100° +2$x$=180°

2$x$=80°

$x$=40°

∠ACB=40°

∠ABC=40°

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