Question 1149290
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The given {{{highlight(cross(traingles))}}} <U>triangle</U> is an isosceles triangle with AB=AC. If Angle A measures 78 degrees find the measure of Angle B
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The measure of the angle B is  m(B) = {{{(180-78)/2}}} = 51 degrees.


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    <U>Rationales</U> :


        a)  the angles at the base of an isosceles triangle are congruent,  and

        b)  the sum of interior angles of each triangle is 180 degrees.
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