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Math Worksheets

Lessons for Fourth Grade

Free Printable Worksheets

Printable “Geometry” Worksheets:

Types of Angles

Lines of Symmetry

Classify Triangles

Angles are formed when two rays meet at a common point. Angles can be classified based on their relationship to a right angle (90 degrees).

Here are some of the different types of angles:

- Acute Angle:

An acute angle is smaller than a right angle.

Its measure is greater than 0 degrees and less than 90 degrees. - Right Angle:

A right angle measures exactly 90 degrees. - Obtuse Angle:

An obtuse angle is larger than a right angle.

Its measure is greater than 90 degrees and less than 180 degrees. - Straight Angle:

A straight angle measures exactly 180 degrees.

It is formed by a straight line, equivalent to two right angles. - Reflex Angle:

A reflex angle is larger than a straight angle.

Its measure is greater than 180 degrees and less than 360 degrees. - Full angles measure exactly 360 degrees. They form a complete circle.

Have a look at this video if you need help on how to make and use a right angle template.

Have a look at this video if you need help on how to classify different types of angles.

Click on the following worksheet to get a printable pdf document.

Scroll down the page for more **Types of Angles Worksheets**.

**Printable**

(Answers on the second page.)

Types of Angles Worksheet #1

Types of Angles Worksheet #2

Types of Angles Worksheet #3

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