1. O is a point on side PQ of a APQR such that PO = QO = RO, then
(a) RS? = PR ? QR
(b) PR? + QR? = PQ?
(c) QR? = QO? + RO?
(d) PO? + RO? = PR?
2. In ABC, DE || AB. If CD = 3 cm, EC = 4 cm, BE = 6 cm, then DA is equal to
(a) 7.5 cm
(b) 3 cm
(c) 4.5 cm
(d) 6 cm
3. In a square of side 10 cm, its diagonal = ?
(a) 15 cm
(b) 10?2 cm
(c) 20 cm
(d) 12 cm
4. D and E are respectively the points on the sides AB and AC of a triangle ABC such that AD = 2 cm, BD = 3 cm, BC = 7.5 cm and DE || BC. Then, length of DE (in cm) is
(a) 2.5
(b) 3
(c) 5
(d) 6
5. In a rectangle Length = 8 cm, Breadth = 6 cm. Then its diagonal = ?
(a) 9 cm
(b) 14 cm
(c) 10 cm
(d) 12 cm
6. In a rhombus if d1 = 16 cm, d2 = 12 cm, its area will be?
(a) 16 ? 12 cm?
(b) 96 cm?
(c) 8 ? 6 cm?
(d) 144 cm?
Please solve these questions with explanation...