Find the ratio of the perimeter to the area of the given triangle.

Find the area of the triangle formed by joining the mid-points of the sides of the triangle whose vertices are (0, -1), (2, 1) and (0, 3). Find the ratio of this area to the area of the given triangle.

Find the value of tantheta in the given triangle.

Each side of triangle ABC is divided into three equal parts. Find the ratio of the are of hexagon P Q R S T U to the area of the triangle ABC.

The angles of a triangle are in the ratio 1:2:3, find the measure of each angles of the triangle.

A triangle with integral sides has perimeter 8 cm. Then find the area of the triangle

Find the cosine of the angle at the vertex of an isoceles triangle having the greatest area for the given constant length e of the median drawn to its lateral side.