GEOMETRY TUTORIAL
How to Calculate the Area of Circles (Full, Half, and ¾ Circle)
Learn how to find the area of full circles, half circles, and three-fourths of a circle using the correct formula and clear visuals.
Subject hub
Explore Geometry
Explore shape, measurement, area, circumference, volume, and other geometry topics. Begin with a visual tutorial and use practice activities as they become available.
Watch Geometry Tutorials
Start with a clear explanation or browse the complete video collection for this subject.
GEOMETRY TUTORIAL
How to Calculate the Area of Rectangles, Parallelograms, and Triangles
This tutorial walks you through how to calculate the area of rectangles, parallelograms, and triangles—all in one video!
GEOMETRY TUTORIAL
How to Calculate the Circumference of Circles (Full, Half, ¾ Circle)
Learn how to calculate the circumference of a full circle, half circle, and three-fourths of a circle using visual diagrams and step-by-step examples.
Practice Geometry
Work through continuously generated questions and review the tutorial whenever you need help.
Area of Triangles & Quadrilaterals
Practice calculating area, converting square units, and working backwards to find missing lengths and heights.
2(lw + lh + wh)
Surface Area of Cuboids
Calculate surface area through Foundation, Core, and Challenge modes, including missing-face reasoning and square-unit conversions.
dm³ ↔ L
Converting Between Cubic Units and Liters
Practice converting between cubic units and liters through Foundation, Core, and Challenge modes.
More Geometry practice activities coming soon.