The shapes you made have different attributes. Let’s look at these attributes.

## Number of Sides Count the sides of each shape. If the shape has 3 straight sides, it is a triangle. If the shape has 4 straight sides, it is a quadrilateral. Separate the triangles from the quadrilaterals.

## Equal Length Sides Now let’s look at the quadrilaterals. Look at each one. Does it have any sides of the same length? You can measure the sides with a ruler to check if they are the same length. If you do not have a ruler, you can use string to measure and compare.

Some quadrilaterals may have 2 sides that are the same length. Some may have 4 sides of the same length. Others may have 2 pairs of sides that are the same length.

• Which quadrilaterals have only two sides that are the same length?
• Which ones have 4 sides that are the same length?
• Which ones have 2 pairs of sides that are the same length?

## Parallel Sides Parallel lines are two lines that are always the same distance from each other. If you extend their ends on either side, they never touch each other. This is the same for parallel sides. They are always the same distance apart and if you extend them on either end, they will never touch.

• Which quadrilaterals have parallel lines?
• Which ones have two pairs of parallel lines?

## Right Angles Right angles are 90º angles. They look like the corner of a piece of paper.

• Which quadrilaterals have right angles?