किसी बात को

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

The dimensions of a luggage box are 70 cm, 50 cm, and 30 cm. How many sq. cm of cloth is required to cover the box?

If G is the centroid and AD, BE, CF are three medians of ∆ABC with area 108 cm² , then the

area of ∆EFG is?

In a triangle ABC, the incenter is at O. Find angle BAC if angle BOC=115°.

In a trapezium, the lengths of the parallel sides are 20 cm and 30 cm, and the height is 12 cm. Find the area of the trapezium.

If G is the centroid and AD, BE, CF are three medians of ∆ABC with area 78 cm² , then the area of ∆EFG is?

The area of the largest triangle inscribed in a semi-circle of radius R is-