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Help me with this thing

Help me with this thing-example-1
User Luchxo
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Consider only triangle BDH. Interior angles B and D are given, and "x" is the exterior angle at H. The measure of that exterior angle is the sum of the measures of the opposite interior angles (B, D).

x = ∠B +∠D
x = 46° +33° = 79°
User Egghead
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