Complete and show the following.​
a ABCD is a rhombus and AC} is one of its diagonals.
Without assuming parallel sides, explain why Δs ABC and ADC are congruent.
b Deduce from a that ABCD is a parallelogram.

Complete and show the following.​ a ABCD is a rhombus and AC} is one of its diagonals. Without assuming parallel sides, explain why Δs ABC and ADC are congruent class=

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