Quadrilaterals (constructions)
Overview
Important
A quadrilateral is a polygon with four sides and four vertices. Constructing quadrilaterals involves using geometric tools (ruler, compass, protractor) to draw sides of given lengths and angles, or to ensure properties like parallelism or perpendicularity.
Important properties
-
The sum of the interior angles of any quadrilateral is 360°.
-
Quadrilaterals can be classified by side lengths and angles (e.g., parallelogram, rectangle, rhombus, square, trapezium).
-
To construct a specific quadrilateral, you often need to know certain combinations of sides and angles (e.g., all sides and one angle, or two sides and two angles, etc.).