# CBSE Class 9 Maths Angle Sum Property of A Triangle

## Next Videos

- What is angle sum property
- In the given figure, AB||CD. Find the value of x.
- answer to all question
- Please answer this question
- Can a triangle have
(i) Two right angles? (ii) All angles less than 60
^{o}? (iii) All angles equal to 60^{o}? (iv)Two acute angles? Justify your statement in each case. - If the bisectors of B and C of triangle of a ABC intersect at O, then prove that BOC = 90
^{o}+ . - The sides AB and AC of a triangle are produced to D and E respectively. The bisectors of CBD and BCE meet at O. If A = 40
^{o}, find BOC. - In triangle ABC, if A + B = 108
^{o}and B +C = 130^{o}, find A, B and. C - In triangle PQR, if
_{}P -_{}Q = 42^{o}and_{}Q -_{}R = 21^{o}, find_{}P,_{}Q and_{}R. - Calculate the value of x in the given figure.

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