Answer:
A, D
Explanation:
You want to identify the pair of congruent triangles among those shown in the figure.
Congruent triangles
We observe all of the triangles are right triangles. For the purpose here, it is convenient to identify the triangles by the lengths of their legs:
- A: 3, 4
- B: 4, 4
- C: 3, 5
- D: 3, 4
- E: 3, 3
Triangles A and D have the same leg lengths, so are congruent.
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Additional comment
The LL or SAS congruence theorems apply.
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