Types of Angles

Right On!

Types of Angles

Angles can be funny!

Angles can be practical!

Angles can be fun!

Angles can be powerful!

Angles can be beautiful!

Angles can be helpful

Angles can even win the game!

But did you know that there are different types of angles?

There are acute angles• These are angles that are more than

0° and less than 90°.This one is 80 degrees

This one is 30 degrees

Acute has the word cute in it.

Aren’t acute angles cute?

You’re such a cutie!

You’re such a cutie!

I’m such a cutie!

He’s such a cutie!

There are also right angles• These are angles that always

measure 90°!

Right angles are “Right on.”• Notice that when you give the “thumbs up,” it

makes a right angle!” “Right on!”

Obtuse AnglesThese are angles that are more than 90° and less than 180°.

Obtuse angles are obese angles! They are really fat angles!

Big is beautiful!

I agree, big is beautiful!

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Reflex Angles

• A Reflex Angle is more than 180° but less than 360°

Straight Angles

• A straight angle changes the direction to point the opposite way. It looks like a straight line.

• It measures 180° (half a revolution, or two right angles)

Let’s go hunting for angles!• You can work independently or in groups of

two.• Look around the room and see if you can

find any angles that already exist.• Can you find 5 acute angles, 5 obtuse angles

and 5 right angles?• Make a list and, if possible, collect the items.• When everyone is finished share your

findings!