# CBSE Class 9 Maths Types And Angle Sum Property

## Videos

- each side of square field ABCD is 50 m long, length of diagonal field is (route 2 =1.414
- diagonal AC of a parallelogram ABCD bisects ∆A . i . it biseets ∆C also ii . ABCD is a rhombus
- Why is'nt the angle sum property true for a concave quadrilateral even when we can divide it into two triangles
- what is quadrilaterals
- Why is the angle sum property not applicable to concave quadrilateral?(please explain briefly and if possible with proof and example) Thank you.
- In a quadrilateral ABCD, the line segments bisecting C and D meet at E. Prove that A + B = 2 CED.
- In the given figure, PQRS is a quadrilateral in which PQ is the longest side and RS is the shortest side. Prove that R > P.
- The angles of a quadrilateral are in the ratio 3: 5: 9: 13. Find all the angles of the quadrilateral.
- In the given figure, LMNQ is a parallelogram in which L = 75
^{o}and QMN = 60^{o}. Find NQM and LQM. - In the figure, PQRS is a trapezium in which PQ SR. if P = 55
^{o}and Q = 70^{o}, find R andS.

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