How are the SAS similarity criterion and the SAS congruence criterion alike? How are they​ different? Both use pairs of equal ratios, but the SAS similarity criterion uses right angles, while the SAS congruence criterion uses congruent angles.

Both use two pairs of corresponding sides and the angles included by those sides, but the SAS similarity criterion uses pairs of equal side-length ratios, while the SAS congruence criterion uses pairs of equal sides.

Both use pairs of equal ratios, but the SAS similarity criterion uses congruent angles, while the SAS congruence criterion uses right angles.

Both use two pairs of corresponding sides and the angles included by those sides, but the SAS similarity criterion uses pairs of equal sides, while the SAS congruence criterion uses pairs of equal side-length ratios.