Q47 of 160 Page 144

The angles P, Q, R and S of a quadrilateral are in the ratio 1:3:7:9. Then PQRS is a

Let the angles be x , 3x , 7x ,9x

x + 3x + 7x + 9x = 360⁰

⇒ 20x = 360⁰

⇒ x = 18⁰

Angles P, Q, R and S = 18⁰,54⁰,126⁰ & 162⁰

∠ P ,∠S & ∠Q, ∠R are supplementary

So PQ ||RS and it’s a trapezium

Two adjacent angles of a parallelogram are in the ratio 1:5. Then all the angles of the parallelogram are

A parallelogram PQRS is constructed with sides QR = 6cm. PQ = 4cm and PQR = 90°. Then PQRS is a

PQRS is a trapezium in which PQSR and P = 130°, Q = 110°, then R is equal to :

The number of sides of a regular polygon who’s each interior angle is of 135° is