The sides of a tringle are 8 cm, 10 cm and 12 cm. Prove that the greatest angle is double of the smalest angle.

If the sides of a triangle are 3 cm, 4 cm and 6 cm long, determine whether the triangle is a right-angle triangle.

If the sides of a triangle are 3 cm, 4 cm and 6 cm long, determine whether the triangle is right-angled triangle.

The sides of a triangle are 5 cm, 8 cm and 11 cm respectively. Demtermine whether it is a right angled triangle or not.

The two shorter sides of right angles triangle are 5 cm and 12 cm. Let theta denote the angle opposite to the 5 cm side. Find sintheta, costheta and tantheta .

The area of the triangle whose sides. are 5 cm, 13 cm and 12 cm is

If two sides of a tringle are of length 5 cm and 1.5 cm, then the length of third side of the triangle cannot be

In any triangle ABC, the sides are 6 cm, 10 cm and 14 cm. Then the triangle is obtuse angled with the obtuse angle equal to

Two sides of a triangle are 12 cm and 14 cm. The perimeter of the triangle is 36 cm. What is its third side?

The sides of a quadrilateral ABCD are 6 cm , 8 cm , 12 cm and 14 cm (taken in order), respectively and the angle between the first two sides is a right angle. Find its area.

Two sides of a parallelgram are 12 cm and 8 cm. If one of the interior angles is 135^@ , then find area of the parallelogram.