Three angles of a quadrilateral are respectively equal to 110^0,50^0,40^0. Find its fourth angle.
In a quadrilateral ABCD, CO and DO are the bisectors of ∠C and ∠D respectively. Prove that ∠COD = 1/2 (∠A + ∠B).
Find the measure of all the angles of a parallelogram, if one angle is 24^00 less than twice the smallest angle.
The perimeter of a parallelogram is 22cm. If the longer side measures 6.5cm what is the measure of the shorter side?
In a ΔABC, BM and CN are perpendiculars from B and C respectively on any line passing through A. If L is the mid-point of BC, prove that ML = NL.
In figure, M, N and P are mid-points of AB, AC and BC respectively. If MN = 3 cm, NP = 3.5 cm and MP = 2.5 cm, calculate BC, AB and AC.
ABC is a triangle and through A, B, C lines are drawn parallel to BC, CA and AB respectively intersecting at P, Q and R. Prove that the perimeter of ΔPQR is double the perimeter of ΔABC.
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