4th Grade Math

Fractions, decimals, and geometric concepts for fourth grade students.

Understanding FractionsDecimals and Place ValueShapes and Geometry Basics
Equivalent FractionsAdding and Subtracting FractionsExploring 3D Shapes
Fractions and Decimals in CookingGeometry in Building and DesignMoney Matters: Decimals in Everyday Life
Break Down Big ProblemsCheck Your Work With Estimation
Understanding Fracti...Decimals and Place V...Shapes and Geometry ...Equivalent FractionsAdding and Subtracti...Exploring 3D ShapesFractions and Decima...Geometry in Building...Money Matters: Decim...Break Down Big Probl...Check Your Work With...
Basic Concepts

Shapes and Geometry Basics

What is Geometry?

Geometry is the study of shapes and their properties. We see shapes all around us, from triangles in road signs to rectangles in books!

Common 2D Shapes

  • Square: Four equal sides and four right angles
  • Rectangle: Opposite sides are equal and four right angles
  • Triangle: Three sides and three angles
  • Circle: All points are the same distance from the center

Perimeter and Area

  • Perimeter is the distance around a shape.
  • Area is the amount of space inside a shape.

Why Study Geometry?

Geometry helps us design, build, and understand the world around us. Architects, artists, and engineers use geometry every day!

Real-World Uses

  • Drawing or cutting paper into different shapes
  • Building a fence around a garden (perimeter)
  • Decorating a room with wallpaper (area)

Examples

  • Finding the area of your rectangular desk to see how much space you have for your books.

  • Measuring the perimeter of a playground to know how much fencing is needed.

In a Nutshell

Geometry is about understanding shapes, their properties, and measurements.

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Equivalent Fractions