When the medium particles start to vibrate there is a change from kinetic energy to potential energy and vice versa.These are called as mechanical waves.
kingvj
CONSTRUCTION JOIN A AND C , B AND C
In triangle APC and triangle BPC,
AC=BC.............RADII OF THE CIRCLE
AP=BP..............TANGENTS FROM A COMMON POINT
PC=PC.............COMMON SIDE
TRIANGLE APC IS CONGRUENT TO TRIANGLE BPC
ANGLE APC =ANGLE BPC......CORRESPONDING PARTS OF CONGRUENT TRIANGLES ARE CONGRUENT
kingvj
