Quadrilaterals
A quadrilateral is a two-dimensional shape with four sides and four angles. There are a lot of different kinds of quadrilaterals: familiar ones like squares and rectangles and less familiar ones like parallelograms and trapezoids. Quadrilaterals are classified based on the number of parallel lines, equal sides, and angles. Watch this lecture series and complete the interactive exercises.
Practice
Quadrilateral types - Questions
1. All parallelograms have opposite sides that are equal in length and parallel.
The matching arrow labels indicate that two opposite sides are parallel.
| Quadrilateral | Parallelogram/Not parallelogram |
 |
parallelogram not parallelogram |
 |
parallelogram not parallelogram |
 |
parallelogram not parallelogram |
2. What kinds of quadrilateral is the shape shown?
The matching arrow labels indicate that two opposite sides are parallel.
Choose all answers that apply:
(A) Parallelogram
(B) Rhombus
(C) Rectangle
(D) Square
3. All rhombuses have all sides that are equal in length and opposite sides that are parallel.
| Quadrilateral | Rhombus/Not Rhombus |
 |
Rhombus Not Rhombus |
 |
Rhombus Not Rhombus |
 |
Rhombus Not Rhombus |
4. What kinds of quadrilateral is the shape shown?
The matching arrow labels indicate that two opposite sides are parallel.
Choose all answers that apply:
A) Parallelogram
(B) Rhombus
(C) Rectangle
(D) Square