Question

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Answer 1

The answer that goes in the blank is
`\triangle FED`

So
`\triangle ABC \cong \triangle FED`

The order of the letters is important.

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Step-by-step explanation:

The sequence ABC has the letter A go first, B next, then C last. The order is important. This ordering will help us find the answer.

Note that the triangle ABC reflects over a horizontal line so that point A moves to F, point B moves to E, and point C moves to D.

This means that F is the first letter of the answer, E is the next, followed by D last. This means ABC in that exact order corresponds to FED in that exact order.

Therefore, triangle ABC is congruent to triangle FED

We write this as
`\triangle ABC \cong \triangle FED`