Plot the triangles on graph paper.

You will see that triangle DEF is just a translation of triangle ABC by the vector (3,5).

Since translations angles and lengths, the 2 triangles are congruent.

Amy S.

asked • 11/24/20Use the vertices of /\ ABC and /\ DEF to show that <A=<D (= equals congruent to)(/\ equals triangle)

9. A(l, 2), B(4, -3), C(2, 5), D(4, 7), E(7, 2), F(5, 10)

how to solve: Use the Distance Formula to find the side lengths of the triangles. Use the SSS Congruence Postulate to show that /\ABC = /\DEF. Then use the fact that corresponding parts of congruent triangles are congruent to prove that ∠ A =∠ D.

Can someone help with this?

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Plot the triangles on graph paper.

You will see that triangle DEF is just a translation of triangle ABC by the vector (3,5).

Since translations angles and lengths, the 2 triangles are congruent.

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