APOLLONIUS GALLUS
... Given two circles with center A and B, and a straight line (CZ). Perform parallel translation to the given line in the direction perpendicular to BZ (away), by a unit equal to the radius ( R1 AL ) of the first circle. A new line HX (dotted) is formed. Construct a circle concentric to B, with radiu ...
... Given two circles with center A and B, and a straight line (CZ). Perform parallel translation to the given line in the direction perpendicular to BZ (away), by a unit equal to the radius ( R1 AL ) of the first circle. A new line HX (dotted) is formed. Construct a circle concentric to B, with radiu ...
properties of quadrilaterals
... Proving That a Quadrilateral is a Parallelogram Any one of the following methods might be used to prove that a quadrilateral is a parallelogram. 1. If both pairs of opposite sides of a quadrilateral are parallel, then it is a parallelogram (definition). 2. If both pairs of opposite sides of a quadr ...
... Proving That a Quadrilateral is a Parallelogram Any one of the following methods might be used to prove that a quadrilateral is a parallelogram. 1. If both pairs of opposite sides of a quadrilateral are parallel, then it is a parallelogram (definition). 2. If both pairs of opposite sides of a quadr ...