Classifying Quadrilaterals

Compare and Classify Quadrilaterals

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Right Angles

Right Angles are angles that are made when two sides meet to create a PERFECT corner.

You can find right angles all around you! Look around, do you see any??

Right Angles

Right Angles are angles that are made when two sides meet to create a PERFECT corner.

You can find right angles in common shapes like SQUARES and RECTANGLES!

Multiple Choice

Does this shape (Trapezoid) have any right angles?

• Yes

• No

Multiple Choice

Does this quadrilateral (Square) have any right angles?

• Yes

• No

Polygons

Shapes that have no gaps or overlaps between the straight sides are called polygons!

Non Examples of a Polygon

The picture show is two examples of shapes that are not polygons.

**Polygons have 3 or more STRIAGHT SIDES

***Polygons do not have GAPS anywhere

Multiple Choice

Is this a polygon?

• Yes

• No

Quadrilaterals

polygons with four straight sides are called quadrilaterals

Parallel Lines

Parallel Lines are lines that will NEVER cross or touch each other!

A rectangle has (2) sets of Parallel lines.

For Example:

Side A is parallel to side B

and

Side C is parallel to side D

Multiple Choice

Does this quadrilateral have parallel lines?

• Yes

• No

• Not sure

Parallel lines

Some Figures have four sides but only 1 set of Parallel Lines

Multiple Choice

Does this quadrilateral have parallel lines?

• Yes

• No

• Not sure

Multiple Choice

Does this quadrilateral (Rhombus) have parallel lines?

• Yes

• No

• Not Sure

Rhombus

A rhombus may not have any right angles, BUT it does have (2) sets of Parallel lines!

**Remember a "set" means two, just like a "pair" means two

Parallelogram

These are four-sided figures that have EXACTLY two sets of Parallel Lines.

Multiple Choice

Is this square also a parallelogram

• Yes

• No

• I'm not sure

Parallelogram? YES!

ALL squares can also be classified as parrallelogram because squares have (2) sets of Parallel Lines!

Polygon Wrap up

• Polygons have 3 or more Straight Angles.

• No Open gaps and no curves.

• Closed

• Can not be round/circl

Multiple Choice

Name the polygon.

• Hexagon
• Heptagon
• Octagon
• Decagon

Multiple Choice

Name the polygon.

• Rhombus
• Pentagon
• Hexagon
• Heptagon

Multiple Choice

The shapes in the pictures are all--

• Triangles
• Trapezoids
• Parallelograms
• Heptagons

Multiple Choice

which one is a polygon?

Multiple Choice

Which one is a polygon?

Right Angle Wrap up

The point where sides meet to make a "perfect" corner an angle.

Parallel Line Wrap Up

Parallel sides are straight lines that will never cross or touch