in the following FIGURE AB=AC and EC=ED angle ABF=45 angle
ABC=70. find the angles represented by the letters a,b,c,d,e,f;g
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< a = <ABC = < ACB = 70°
< b = 180 - ( 70-70) = 180-140= 40°
<c = 180 - (45+40)
==> 180 - 85 = 95
<b = <d = 40°
<e = 180 - (40 +95) = 180°-135° = 45°
<ECD = 180 - (<a + <d) = 180 - (70+40)
===> 180-110= 70°
<f = <ECD = 70°
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