As shown in the figure, triangle ABC is equal to triangle def, and angle a is equal to 52%, angle B = 31.21'ed = 1ocm

AB=DE=10cm
∠F=∠C=180°-∠A-∠B
=96°39’

RELATED INFORMATIONS

1. It is known that ab ‖ De, BC ‖ EF, D, C are on AF, and ad = CF
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