A convex quadrilateral is a square if and only if it is any one of the following: 1  a rectangle with two adjacent equal sides. 2  a rhombus with a right vertex angle. 3  a rhombus with all angles equal. 4  a parallelogram with one right vertex angle and two adjacent equal sides. 5  a quadrilateral with four equal sides and four right angles.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ that was what the answer was before, the real answer is Solymon Merrick patented the first wrench in 1835. The physics of a wrench are that the tool works as lever. There are notches at the mouth for gripping. The wrench is pulled at a right angle to the axes of the lever-action and the bolt or nut. Some wrenches have mouths that can be tightened to better fit various objects that need turning. Monkey Wrench Charles Moncky invented the monkey wrench around 1858.
A German named Charles Wiesenthal who lived in England got patented the needle that he designed for sewing machine in 1755. It was in 1790 Thomas Saint, who was an English inventor and a...