In the following figure if OA=10 and AC=16, then OB must be:

In the given figure AD ‖ BC, if ∠ABC=72°, then ∠BCD=?

ABCD is a trapezium in which AB‖CD. M and N are the mid points of AD and BC respectively. If AB=14 cm and MN=15 cm, find CD.

In the given figure, AB‖CD, find the value of x:

One angle of pentagon is 140°. If the remaining angles are in the ratio 1 : 2: 3: 4, the size of the greatest angle is:

Two circle X and Y with centres A and B intersect at C and D. If area of circle X is 4 time area of circle Y, then AB=?

A circle touches a quadrilateral ABCD. Find the true statement: -

The lengths of the lengths placed on the sides of a point inside an equilateral triangle are 6 cm, 8 cm and 10 cm. What is the area of the triangle?