Question

which pair of triangles is congruent by side - side - side? 1 2 3 4

Explanation:

Step1: Recall SSS Congruence Criterion

Two triangles are congruent by SSS (Side - Side - Side) if all three corresponding sides of one triangle are equal to the corresponding sides of the other triangle.

Step2: Analyze Pair 1

In pair 1, we can observe that the three sides of one triangle are equal to the three sides of the other triangle. The vertical sides are equal (common side in the overlapping structure), and the other two marked sides are equal.

Step3: Analyze Pair 2

Pair 2 has two sides equal but the SSS criterion requires three sides. Also, the angle markings suggest it might be ASA or AAS (not SSS).

Step4: Analyze Pair 3

Pair 3 has a right - angle (suggesting HL if right - angled, but not SSS as we need three sides marked for SSS in a non - right - angled context here)

Step5: Analyze Pair 4

Pair 4 has some side markings but not all three pairs of corresponding sides clearly marked as equal for SSS.

Answer:

1