What is the main ore of

Determine the inradius of an equilateral triangle whose altitude measures 9√3 cm.

Find the area of a triangle whose sides are 12 m, 14 m, and 16 m.

Find the area of the triangle formed by the line 5x + 3y = 15 and the x-axis and the y-axis.

Area of a triangles with vertices at (2, 3), (-1, 0) and (2, -4) is :

A right-angled triangle has one leg of 12 cm and the hypotenuse of 13 cm. Find the length of the other leg.

Calculate the altitude of an equilateral triangle having each side of length 10√3 cm.

A △ ABC has sides 5 cm, 6 cm and 7 cm. AB extended touches a circle at P and AC extended touches the same circle at Q. Find the length (in cm) of AQ.

If the angles of a triangle are in the ratio of 2:5:8, then find the value of the biggest angle.

If area of similar triangles ∆ ABC and ∆ DEF be 64 sq Cm and 121 sq cm and EF = 15.4 cm then BC equals