Polygons and Quadrilaterals

Which pictures include parallel lines?

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Let's review!

Which of these shapes are polygons?

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Answer explanation

Remember, polygons have:

Straight sides or edges

• 2 edges that meet at a vertex (point where 2 edges meet)

• No gaps or spaces

• No leftover lines or intersecting lines (lines that cross each other)

Here's a few quadrilaterals! What do they all have in common?

A quadrilateral is a two-dimensional shape with four sides and four angles.

“quad” means 4 and “lateral” means sides.

Which of these are quadrilaterals?

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What is this quadrilateral called?

Answer explanation

• A square is a quadrilateral with 4 equal sides and 4 right angles.

If I slide a piece of paper into the corner of a shape and it fits PERFECTLY, it is a right angle!  We also call this a 90 degree angle! 

Draw a picture of a rectangle

Answer explanation

A rectangle is a quadrilateral with 4 right angles.  Its opposite sides are equal and parallel.

Remember parallel lines are lines that will never cross each other.  Think TRAIN TRACKS!

What is this a picture of?

• circle

• trapezoid

• rectangle

• square

Answer explanation

• A trapezoid is a quadrilateral that has exactly 1 pair of parallel sides.

• A rhombus is a quadrilateral that has 4 equal sides. 

Its opposite sides are parallel.

Draw a rhombus.

Answer explanation

This is an example of a rhombus!

A parallelogram is a quadrilateral that has opposite sides that are equal and parallel. 

Which do you think are parallelograms?

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Answer explanation

Did you know a square is also a rhombus? It has 4 equal sides and its 4 sides are parallel!

Take a picture of a quadrilateral shaped object in our classroom!