Interior angles in a triangle add up to 180 ... The sum of interior angles in a quadrilateral is 360˚. In a square or rectangle, each interior angle is 90˚. In irregular quadrilaterals ...

Set squares are drawing instruments used to create vertical, horizontal, and diagonal lines as well as certain angles ... the form of triangles are typically called "triangles." Sets of drawing ...

With each dimension, a triangle adds just one corner; a square, on the other hand ... concerned with the relationships ...