Question

what is a triangular pyramid ? what is a pyramid called if its base is a square

Answer 1

TRIANGULAR PYRAMID IS A FIGURE FORMED BY JOINING THE CORRESPONDING VERTICES OF 2 TRIANGLES

IF THE BASE IS SQUARE THEN THE PYRAMID IS CALLED A CUBE

Answer 2

it is a 3 diminished thing
it emits seven colours
when the white light enters
this is usually called as vibgor