Find measure of central angle of the arc whose length is 22 cm and radius of the circle is 28 cm?

If the graph of the equations x + y = 0 and 5y + 7x =24 intersect at (m, n), then the value of m + n is :

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

If one of the interior angles of a regular polygon is equal to 5/6 times of one of the interior angles of a pentagon, then the no. of sides of the polygon.

In a given circle, the chord PQ is of length 18 cm. AB is the perpendicular bisector of PQ at M. If MB=3. Find the length of AB?

In the given figure ΔDEF is right angle triangle, ∠G=120° and DG=12 cm , GF=10 cm then find out the value of DF.

In the given figure AD ‖ BE, and ∠DCE=85° and ∠BDC=30° then find out the value of x?

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