, at point , at point , and intersects at , if , find the measure of in degrees.
InNote : Figure not drawn up to scale.
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In actual D , F and E conside C and since B F = A C , so the the triangle is a right angled isosceles triangle with ∠ C = 9 0 o and other two angles = 4 5 o .
therefore ∠ A B C = 4 5 o