You are here: Home > Student Activities > Alphabet Geometry > Acute Angles

Acute Angles

More Alphabet Geometry

Angles
Parallel Lines
Symmetry
Transformations

Acute Angles

Introduction

Definition

Review

Quick Quiz

Students should be able to:

identify and describe the relative size of acute and obtuse angles with respect to right angles.

Introduction to Acute Angles: The Letter V

Take a look at the letter V below and then compare it to the angles below it.

Which angle does it look like the most?

1 - acute angle; 2 - right angle; 3 - obtuse angle

What can you learn by looking at the letter V?

The letter V looks most like the acute angle. An acute angle is one with a measure less than 90º.

Click the button below to reveal some red dotted lines that will form a right angle, or a 90º angle.

Therefore, when we look at the letter V we see an acute angle.

Use this mini-movie on your SMARTBoard

Subscribe to the misterteacher newsletter

Stay up to date on all of our new, free, mini-movies and student activities as they are added to the site each month.

more from misterteacher.com

Review: What is an acute angle?

An acute angle has a measure less than 90º.

Where are the acute angles? See how many acute angles you can find in the photo below.

Photo Credit Some Rights Reserved

Are there other letters with acute angles?

The letter W has three acute angles. Two are shown to the right. Where is the third?	Use this mini-movie on your SMARTBoard
How many acute angles does the letter X have? Make an educated guess and then push the button on the right to find out.	Use this mini-movie on your SMARTBoard