4th Grade Geometry
Classifying and Measuring Angles

Welcome to the Math Salamanders 4th Grade Geometry worksheets.

Here you will find a range of printable fourth grade geometry worksheets, which will help your child to learn to classify and measure angles using a protractor.

There are also some worksheets which explore the properties of a range of 2d shapes.

4th Grade Math Learning

At Fourth Grade, children enjoy exploring Math with fun Math activities and games. Children will enjoy completing these Math games and Free 4th Grade Math worksheets whilst learning at the same time.

During Fourth Grade, most children learn to round off numbers to the nearest 10, 100, 1000, 10000, 100000 or million. They are able to add columns of numbers together accurately, and subtract numbers proficiently. They show a good understanding of place value in relation to decimals, and can add and subtract decimals with up to 2 decimal places.

Children are able to multiply a range of whole numbers by one or two digits, and divide numbers by a single digit. They can use their multiplication table facts to answer related questions.

Children are able to compare fractions, and know how to work out equivalent fractions. They are able to solve multi-step problems involving whole numbers, fractions and decimals.

These free printable Fourth Grade Math Games, and other Grade 4 Math Worksheets will help your child to achieve their Elementary Math benchmark set out by Achieve, Inc.

In the UK, 4th Grade is equivalent to Year 5.

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4th Grade Geometry

On this webpage you will find our range of free printable geometry worksheets for 4th graders.

There is a range of printable geometry sheets, looking at angles in a variety of forms such as right angles, acute, obtuse and reflex angles.

Using these sheets will help your child to:

  • learn how to classify an angle - right, acute, obtuse, reflex;
  • learn how to measure angles accurately with a protractor;
  • classify different types of triangles - acute, obtuse and right;
  • know that angles in a triangle must add up to 180°
All the free Math sheets in this section support the Elementary Math Benchmarks for Grade 4.

Classifying Angles

Triangle Classification

Angle Measuring

Exploring Deeper Section

The worksheets here involve children applying their knowledge and understanding about 2d shapes.

They are a great way to stretch the more able learners, or get children to think hard about the properties shapes have.

Although the sheets in this section are aimed at 4th grade, they could easily be used by older children.

The first three sheets are in our 3rd Grade Geometry section.

There are UK versions of these sheets due to the different definitions of trapezoid and trapezium!

Looking for some easier Geometry Worksheets

Here is a range of free geometry worksheets for 3rd graders.

Using these sheets will help your child to:

  • recognize and identify a range of 2d and 3d shapes;
  • recognise and identify right angles and lines of symmetry;
  • recognise and identify parallel lines;
  • identify the faces, edges and vertices of 3d shapes;

The sheets in this section are at a simpler level than those on this page.

Looking for some harder Geometry Worksheets

Here is our selection of 5th grade Geometry worksheets about angles.

Using these sheets will help your child to:

  • learn how to find a missing angle;
  • know that angles inside a right angle must add up to 90°
  • know that angles on a straight line must add up to 180°
  • know that angles around a point must add up to 360°
  • know that angles in a triangle must add up to 180°

The sheets in this section are at a more advanced level than those on this page.

More Recommended Math Worksheets

Take a look at some more of our worksheets similar to these.

Coordinate Worksheets

Here is our collection of printable coordinate plane grids and coordinate worksheets.

Using these fun coordinate sheets is a great way to learn math in an enjoyable way.

Using these sheets will help your child to:

  • plot and write coordinates.

Area & Perimeter Worksheets 3rd and 4th grade

Here is our range of area and perimeter worksheets.

Using these sheets will help your child to:

  • know what area and perimeter are;
  • know how to find the area and perimeter of rectangles;
  • know how to find the area and perimeter of rectilinear shapes;

All the sheets in the section below support elementary math benchmarks.


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The Math Salamanders hope you enjoy using these free printable Math worksheets and all our other Math games and resources.

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