Geometry Fun
Explore shapes, angles, area, and perimeter with interactive tools!
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Lesson Plan
Introduction to Shapes
Meet all the basic 2D shapes and learn their special properties.
Polygons vs. Curved Shapes
Learn the difference between shapes with straight sides and curved edges.
Angles: Acute, Right, & Obtuse
Measure and classify different types of angles.
Triangles Everywhere
Explore equilateral, isosceles, and scalene triangles.
Quadrilaterals
Dive into squares, rectangles, parallelograms, and trapezoids.
Perimeter of Polygons
Add up all the sides to find the distance around a shape.
Area of Rectangles
Multiply length times width to fill a shape with unit squares.
Area of Triangles
Use the base and height formula to find triangle area.
Circles: Radius & Diameter
Understand the parts of a circle and how they relate.
Circumference of a Circle
Use pi to find the distance around any circle.
3D Shapes
Jump into cubes, spheres, cylinders, and cones.
Volume of Boxes
Calculate how much space fits inside a 3D shape.
Surface Area
Add up all the faces to cover a 3D shape completely.
Geometry in the Real World
See how geometry shows up in buildings, art, and nature.
Geometry Challenge Project
Design your own geometric art piece using everything you learned.