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:

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.

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

QA and PB are perpendicular to AB in the given figure. If AO = 10 cm, BO = 6cm, BP = 9 cm, then the length of AQ is__

Find the inradius of a triangle having sides 13, 14 and 15 units.