Question

ABCD is a square, diagonals AC and BD meet at O.
Th e number of pairs of congruent triangles are
(a) 6 (b) 8
(c) 4 (d) 12

Answer 1

4 is correct answer.hope it helps you

Answer 2

Answer:

12

Step-by-step explanation:

ABCD is a Square

AB = BC = CD = DA

AC = BD

AC and BD meet at O.

Diagonals of Square perpendiculallry bisect each other

=> OA = OB + OC = OD

Triangles which are congruent :

Δ OAB , Δ OBC , ΔOCD , Δ ODA

Number of Pairs of congruent Triangles = ⁴C₂ = 6

Also following triangles are congruent

Δ ABC , Δ BCD , ΔCDA , ΔDAB

Number of Pairs of congruent Triangles = ⁴C₂ = 6

so total number of pairs of congruent triangles are 6 + 6 = 12