Question

I need important questions from quadrilaterals chapter class 9 ncert​

Answer 1

hi dear here is ur answer

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1. If the bisectors of angles of a quadrilateral enclose a rectangle, then show that it is a parallelogram.

2. L, M, N, K are mid-points of sides BC, CD, DA and AB respectively of square ABCD, prove that DL, DK, BM and BN enclose a rhombus.

3. PQRS is a parallelogram. PS is produced to meet M so that SM = SR and MR is produced to meet PQ produced at N. Prove that QN= QR.

4. In a ΔABC, DE is parallel to BC and D is the mid-point of side AB. Find the perimeter of ΔABC when AE = 4.5 cm, DE = 5 cm and DB = 3.5 cm.

5. If an angle of a parallelogram is 4/5 of it adjacent angle, then find the measures of all the angles of the parallelogram.

6. ABCD is a trapezium in which AB is parallel to CD. If ∟A = 36° and ∟B = 81°, then find ∟C and ∟D.

7. In a ΔABC, DE is parallel to BC and D is the mid-point of side AB. Find AE and BC if DE = 6 cm and EC = 5 cm.

8. In a parallelogram ABCD find the measure of all the angles if one angle measures 68°.

9. The lengths of diagonals of a rhombus are 24 cm and 18 cm respectively. Find the length of each side of the rhombus.

10. In a parallelogram ABCD find the measure of all the angles if one its angles is 15° less than twice the smallest angle

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hope you can do all these sums

ALL THE BEST

IAM SUNNY

Answer 2

ques no 7 and 6 very very imporant ques