Sand drown disease in tobacco is caused by deficiency

If the area of a regular hexagon is 384√3 cm², then find the perimeter of the same hexagon.

If I is the incentre of ΔABC , if  ∠ BAC = 80⁰ , then what is the measure of  ∠ BIC?

Find the ratio between the area of the in-circle and the circum-circle of a square?

Let A, B, and C be the mid-points of sides PQ, and QR PR, respectively, of ΔPQR. If the area of ΔPQR is 64cm², then find the area of ΔABC.

Angles of a triangle are in the ratio 4 : 6 : 8. Find the measure of the middle angle.

What will be inradius of a right angle triangle whose base is 3 cm & height is 4 cm ?

If in a ΔABC, D is a point on BC such that BD = 5cm , BC = 9 cm then what is ratio of area of ΔABD to area of ΔADC ?

Orthocenter of an right angle triangle lies on