1.

In Fig. PQRS is a rhombus in which the diagonal PR is produced to T. If ∠SRT=152°, find x, y and z.

Answer»

Given, 

PQRS is a rhombus 

∠SRT = 152° 

We know that diagonals of a rhombus bisects each other at 90° 

Hence, 

∠SOR = 90° = y = 90° 

∠SRT+∠SRO = 180° 

(linear pair of angles) 

= 152°+∠SRO = 180° 

∠SRO = 180° - 152°= 28° 

Now, 

∠SRO = z 

∵SR = SP 

= z = 28°

And, 

∠RSO +∠SRO + y = 180° 

(angle sum property of triangle) 

= ∠RSO + 28° + 90° = 180° 

= ∠RSO = 180°-118° = 62° 

= ∠X = ∠RSO = 62° 

(alternate angles)



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