SSATSuite
Know Your Keywords — Math, Standard

Point 11 — Similarity and congruence

What do we see?

Similarity or congruence criteria being tested.

What do we understand?
  • Similarity: SSS, SAS, AAA (AA)
  • Congruence: SAS, SSS, ASA, AAS, RHS (HL)
Tips & traps

SSA is not a congruence criterion. Write down all the criteria before deciding.

Question 1 of 3

For triangle PQR and triangle STU, angles P and S each measure 30°, QR = 24 and TU = 18. Which additional piece(s) of information is(are) sufficient to prove that triangle PQR is similar to triangle STU?

I. The length of PQ is 43 the length of ST.

II. The length of PR is 43 the length of SU.