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General
Easy

Question

Prove that triangles ABC and ADC are congruent using SAS congruence postulate.

hintHint:

Find the angles and sides that are equal and hence prove the congruence.

The correct answer is: △ABC ⩭ △ADC by SAS congruence rule.


    Complete step by step solution:
    SAS postulate: If 2 sides and the included angle of one triangle are equal to 2 sides
    and the included angle of another triangle, then the triangles are congruent by SAS
    congruence criterion.
    Consider 2 triangles, △ABC and △ADC
    From the figure, we have
    ∠ABC = ∠ADC = 90° (given)
    Also, AD = BC (given)
    ∴ △ ABC ⩭ △ADC by SAS congruence rule.

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