Geometry help!
Triangle ABC is congruent to triangle DEF. In triangle ABC, side AB measures 6, side BC measures 5x-21, and side CA measures 5. In triangle DEF, side DE measures 6, side EF measures x-1, and side FD measures 5. What equation would help you solve for the side length of BC and EF? Explain your reasoning using complete sentences.

Question

Geometry help!
Triangle ABC is congruent to triangle DEF. In triangle ABC, side AB measures 6, side BC measures 5x-21, and side CA measures 5. In triangle DEF, side DE measures 6, side EF measures x-1, and side FD measures 5. What equation would help you solve for the side length of BC and EF? Explain your reasoning using complete sentences.

amistre64 · Answer

have you drawn out the triangles yet?

anonymous · Answer

No. I am just confused on this whole thing.

amistre64 · Answer

since the triangles are congruent, they are exactly the same.  draw one triangle and label it:

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then apply the side measures appropriately