Which of the following pairs of triangles can be proven congruent using the SAS criterion?

Two triangles with sides 5 cm, 7 cm and 5 cm, 7 cm and included angle 60°

Two triangles with sides 5 cm, 8 cm and 6 cm, 7 cm

Two triangles with angles 30°, 60° and 30°, 60° and side 5 cm

One triangle with sides of 3 cm, 8 cm and an angle of 90°

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Q1.

Which condition is NOT sufficient to prove that two triangles are congruent?

Q2.

If two triangles have two corresponding sides of the same length and the included angle is different, what can be said about the triangles?

Q3.

What method can be used to verify whether two triangles are congruent if they can be physically cut out?

Q4.

In triangle ABC, if angle A = angle D, side AB = side DE, and side AC = side DF, which congruence criterion applies?