1. Geometry and English Language Learning
Four-sided Shapes
Geometry and English Language Learning

2. Trapezoid
A trapezoid is a four-sided shape with only one pair of parallel sides.

3. A parallelogram is a four-sided shape with opposite sides parallel.

4. Rectangle
A rectangle is a shape with four straight sides and four right angles.

5. Rhombus
A rhombus is a shape with four straight, equal sides, and opposite angles equal.

6. Square
A square is a shape with four straight, equal sides and four right angles.

7. Quadrilateral A quadrilateral is a four sided figure.
All four sided shapes fall under this category.
Parallelograms, trapezoids, rectangles, rhombuses, and squares are all quadrilaterals because they share the same features – having four sides.
There are other categories within quadrilaterals that these shapes fall under.

8. Categories
All of the five shapes are quadrilaterals. This is because they have common features of a quadrilateral – they all have four sides.
A square, rectangle, and rhombus are all in the parallelogram category because they have the same features as a parallelogram – a four-sided shape with opposite sides parallel.
A square is a rectangle and a rhombus. Like a rhombus, it has four straight, equal sides, and opposite angles equal. Like a rectangle, it has four straight sides and four right angles.

9. Categories
A rectangle and rhombus are NOT a square, because they do not have all of the same features as a square: a rhombus does not need to have right angles, and a rectangle does not need all sides equal. A square does.
Why is a parallelogram NOT a rectangle, but a rectangle is a parallelogram?

10. Questions?