EASY
9th CBSE
IMPORTANT
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The sum of two angles of a triangle is equal to its third angle. Determine the measure of the third angle.

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Important Questions on Triangle and its Angles

MEDIUM
9th CBSE
IMPORTANT

In the following figure, if  ABCD, EFBC, BAC=65° and DHF=35°, find AGH.

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MEDIUM
9th CBSE
IMPORTANT

In the following figure, if ABDE and BDFG such that FGH=125° and B=55°, find x and y.

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MEDIUM
9th CBSE
IMPORTANT
If the angles A, B andC of ABC satisfy the relation B-A=C-B, then find the measure of B.
HARD
9th CBSE
IMPORTANT
In ABC, if bisectors of ABC and ACB  intersect at O at angle of 120°, then find the measure of A in degrees.
HARD
9th CBSE
IMPORTANT
If the side BC of ABC is produced on both sides, then write the difference between the sum of the exterior angles so formed and A.
MEDIUM
9th CBSE
IMPORTANT
In a triangle ABC, if AB=AC and AB is produced to D such that BD=BC, find ACD:ADC.
HARD
9th CBSE
IMPORTANT

In the following figure, side BC of ABC is produced to point D such that bisectors of ABC and ACD meet at a point E . If BAC=68°, find BEC in degrees.

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EASY
9th CBSE
IMPORTANT
If all the three angles of a triangle are equal, then each one of them is equal to