Which of the following rivers is NOT included in the

The radius of the incircle of a triangle is 3 cm. if the area of the triangle is 12 cm ² , then its perimeter is?

The internal bisector of ∆ABC at ∠A cuts BC on D and cuts the circumcircle at E. If DE = 6cm, AC = 8cm and AD = 10 cm, then find the length of AB?

The length of the each side of an equilateral triangle is 7√3 cm . The area of circumcircle, (cm ² ) is

In a regular polygon, the ratio of the exterior angle to the interior angle is 4:5. Find the interior angle of the polygon.

Find area of a sector of radius 14 cm with central angle 90°. (π = 22/7)

What will be inradius of an equilateral triangle of side 10 cm?

If O is circumcentre of acute angled triangle ABC, if ∠  BAC = 70˚  then  ∠ BOC = ?

In ΔABC, PQ is parallel to BC If AP: PB= 2:5 and AQ= 2 cm, AC is equal to?