Mathematics
In the given figure, AB // CD, AB = 7 cm, BD = 25 cm and CD = 17 cm; find the length of side BC.

Related Questions
Assertion (A): Angle BOC = 90°.
Reason (R): OC2 = 32 + 42 = 25
OB2 = 62 + 82 = 100
OC2 + OB2 = 125 = BC2

A is true, but R is false.
A is false, but R is true.
Both A and R are true, and R is the correct reason for A.
Both A and R are true, and R is the incorrect reason for A.
In the given figure, ∠B = 90°, XY // BC, AB = 12 cm, AY = 8 cm and AX : XB = 1 : 2 = AY : YC. Find the lengths of AC and BC.

In △ ABC, ∠B = 90°. Find the sides of the triangle, if :
(i) AB = (x - 3) cm, BC = (x + 4) cm and AC = (x + 6) cm
(ii) AB = x cm, BC = (4x + 4) cm and AC = (4x + 5) cm.