Consider triangles ABC and DEF. Side a is congruent to side f. Angle A is congruent to angle F. Angle B is congruent to angle E. What postulate or theorem can be used to prove that the two triangles are congruent?
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Consider triangles ABC and DEF. Side a is congruent to side f. Angle A is congruent to angle F. Angle B is congruent to angle E. What postulate or theorem can be used to prove that the two triangles are congruent?
B = E, A = F
Hence C = D (Because A + B + C = D + E + F = 180 degrees)
A = F, a = f,
Hence triangles are congruent.
When 3 corresponding angles are equal, and a = f (Sides opposite to equal angles), triangles are congruent.
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