Converting waste petrol and thermocal into adhesive substance for better use

this girl shows a pratical demonstration of conversion of waste petrol and thermocol into an adhesive substance which can be used in the contruction industry. This substance is also used in making notepads, handbags, soaptray, etc.

The Pythagoras Theorem

The Pythagoras Theorem was named after the ancient Greek mathematician Pythagoras, supposedly the first to offer a proof of the theorem.