The number of dimensions a solid has is:

Write whether the following statement is True or False. Justify your answer.
$A$ pyramid is a solid figure,the base of which is a triangle,square,or some other polygon,and its side faces are equilateral triangles that converge to a point at the top.

............ is credited with giving the first known proof.

Read the following statement:
"$A$ square is a polygon made up of four line segments,out of which,length of three line segments are equal to the length of fourth one and all its angles are right angles".
Define the terms used in this definition which you feel necessary. Are there any undefined terms in this? Can you justify that all angles and sides of a square are equal?

Euclid stated that all right angles are equal to each other in the form of

In the Indus Valley Civilisation (about $3000\, B.C.$),the bricks used for construction work had dimensions in the ratio: