Two triangles ABC and PQR satisfy angle A = angle P = 90°, hypotenuse BC = QR = 13 cm and AB = PQ = 5 cm. Using Pythagoras, find the length (in cm) of the third side AC, which equals PR.
Class 9Criteria for CongruenceGeometry — Triangles
A24
B11
C12
D13
Step-by-Step Solution
AC=BC2−AB2=169−25=144=12 cm. RHS confirms both triangles are congruent.
Answer: C) 12
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.