Live angle model
Move the angle arm or slider and watch the angle size update immediately.
Free maths tool
Angles tool
A free interactive angles tool for making angles, naming angle types and comparing each turn with a right angle.
Angle names
Show acute, right, obtuse, straight, reflex and complete-turn angle labels as the turn changes.
Right-angle comparison
Compare each angle with a right angle using less than, equal to or greater than language.
Quick presets
Jump to 30, 60, 90, 120, 180 or 270 degrees, or generate a random angle for discussion.
What the tool does
The angles tool gives teachers and students a clean way to model angle turns without redrawing arms on the board.
- drag an angle arm to change the amount of turn
- use a slider to set angles from 10 to 360 degrees
- jump to common angle presets
- see the angle name and degree measure update
- compare the angle with a right angle
How teachers use it
Open it on a classroom screen when students need to connect angle language with the visible amount of turn.
- start at 90 degrees and use it as the benchmark
- move to smaller and larger angles while students name the type
- ask students to predict the label before revealing the new angle
- use random angle examples before moving to independent angle practice
Why it is useful
Angles are easier to compare when students focus on the amount of turn rather than the length of the arms.
- supports angle vocabulary and visual comparison
- makes the right angle benchmark explicit
- works as a model before students move to scored angles practice
Frequently Asked Questions
Is the angles tool free?
Yes. Teachers, students and families can open the angles tool in a browser for free.
What angle types does it show?
The tool shows acute, right, obtuse, straight, reflex and complete-turn angle labels.
Can students change the angle?
Yes. Students can drag the angle arm, use the slider, choose a preset angle or generate a random angle.
Does it score student answers?
No. It is an open modelling tool, not a scored practice activity or student-tracking page.