Cut a right angled triangle, stick a string along its perpendicular side, as shown in fig. (i) hold the both the sides of a string with your hands and rotate it with constant speed.
What fo you observe?

Prove that in any right angled triangle is a perpendicular is drawn from right angular point on hypotenuse then the two triangles on both sides of this perpendicular are similar and each of them is similar to original traingle.

In a right angled triangle the length of the sides containing the righ angle are 3 cm and 4 cm. If the triangle is rotated about its hypotenuse, then two cones will be formed on the opposite side of the same base. Find their total volume.

The sides of a right angled triangle are 20 cm , 16 cm and 12 cm respectively . Find the total volume of the two cones produced by rotating the triangle with its hypotenuse as axis.

The lengths of the adjacent sides of right angle of a right - angled triangle are 20 cm and 15cm. What will be the total volume of the two right circular cones when this triangle is rotated with its hypotenuse taken as the axis ?

The hypotenuse of a right angled triangle has its ends at the points (1, 3) " and " (-4, 1) . Find an equation of the legs (perpendicular sides) of the triangle.

If the sides of a right-angled triangle be (x - 2) cm, x cm and (x +2) cm, then what is the length of its hypotenuse ?