If you are finding it hard to understand angles then you are on the right page! Here you will see why certain angles rules work!
Interior Angles
Angles Around A Point
Straight Line Angles
Before tackling complex shapes, you need to master the foundations. This Interactive Angle Rules Tool brings the three most critical rules of geometry to life, moving beyond static diagrams to show you exactly how angles relate to one another.
Why this tool works:
Visualizing the Math: It can be hard to visualize why angles on a line add to 180° or around a point add to 360°. This tool lets you see the “missing slice” grow and shrink as you move the lines, making the math intuitive.
Dynamic Relationships: When you explore Vertically Opposite angles, you don’t just see two numbers; you see how moving one line immediately forces the opposite angle to change, reinforcing that they are always equal.
Foundation for Geometry: Mastering these three rules is the key to solving almost every other geometry problem, including parallel lines and polygons.
How to use it:
Choose a Rule: Select from Straight Line (180°), Around a Point (360°), or Opposite Angles.
Experiment: Drag the interactive arms to change the angle sizes. Watch the equation update instantly to prove the rule holds true no matter the size.
Test Your Skills: Toggle Quiz Mode to hide one angle and solve for x. It’s the perfect practice for exams!
Visualize angles, shapes, and master the rules.
"We need apps that help students to visually understand Maths."“As the world moves towards online education, we are slowly losing the ability to explore maths using manipulatives. We’ve spent many days and weeks creating interactive manipulatives so that your children can better understand maths.”
Finding interior and exterior angles a struggle? Well, we have a great visual app to help you understand angles in a polygon.
