Euclidean geometry/Parallel lines, quadrilaterals, and circles
< Euclidean geometrySummary of Chapter
To understand the properties of parallel lines, quadlaterals and circles.
Parallel lines
Lines that never intersect are parallel to each other.
Quadrilaterals
A quadlateral is defined as any 4 sided polygon.
Special quadrilaterals
Parallelograms
A parallelogram is a quadrilateral with equal opposite angles and opposite sides with equal length.
Rectangles
A Rectangle is a parallelogram with all right angles.
Squares
A square is a rectangle in which the lengths of all the sides are equal.
Circles
A circle is the set of points in a plane that are a given distance from a given point, the center. The distance between any of the points and the center is called the radius.
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