Of quadrilateral figures, a square is that which is both equilateral and right-angled; an oblong that which is right-angled but not equilateral; a rhombus that which is equilateral but not right-angled; and a rhomboid that which has its opposite sides and angles equal to one another but is neither equilateral nor right-angled. And let all other quadrilaterals besides these be called trapezia.
Click any product to generate a realistic preview (~30s). Up to 3 at a time.
"What do I gain by learning these things?"
"If a straight line fall on two parallel straight lines, it makes the alternate angles equal to one another, the exterior angle equal to the interior and opposite angle, and the interior angles on the …"
"A plane angle is the inclination to one another of two lines in a plane which meet one another and do not lie in a straight line."
"Let the following be postulated:"
"Let it be granted that a straight line may be drawn from any one point to any other point."
Your cart is empty
