Angle Question Generator

Builds a sheet of missing-angle questions at the level you ask for. Every angle is a whole number of degrees, and the working names the rule being used rather than only showing the subtraction. Every question is computed and checked directly — not a fabricated or AI-guessed fact.

How many questions

Between 1 and 30. Ten fills a page.

Level

Seed (optional)

A word reproduces the same sheet, so a whole class can be given the identical set.

Gentle is straight lines, points and vertically opposite angles. Standard adds triangles and quadrilaterals; stretch adds polygon angle sums and isosceles triangles.

Paper size

Print size

Margin

Millimetres of blank edge, 5 to 40.

Turn the paper sideways

Room to answer in

How to print this, or save it as a PDF

There is no PDF to download, and there does not need to be. Open the print command in your browser and choose “Save as PDF” as the destination. The page addresses and dates a browser normally prints across the top and bottom are already kept off.
Set the scale to 100%, not “fit to page”. This sheet is already the exact size of the paper you chose, so anything that resizes it makes every measurement on it wrong.
Leave the paper size in the dialog set to the same one you chose here.

Your questions will appear here.

What this generator does

Generates angle questions with answers — angles on a line, around a point, vertically opposite, in triangles and quadrilaterals, across parallel lines, and interior angle sums. Because the values are constructed rather than stored, every question is genuinely consistent: the angles given always add to what they should, and an isosceles triangle is never given an apex that would leave its base angles as fractions.

How to use this tool

Choose a level and how many questions you want.
Press make questions and work through the sheet.
Show the answers to mark it, or show the working to see which angle fact each question rests on.
Enter a seed word to rebuild the same sheet later.

Common use cases

Angle practice at home or school
Quick geometry warm-ups
Self-testing before a maths quiz

Randomness and fairness

Angles are drawn with the browser's cryptographic random number generator and then constrained so the set sums correctly for the shape — a triangle's three angles always total 180 degrees, which a purely random draw would almost never produce. No question ever asks for an angle of zero or less, which no diagram could show. A seed word rebuilds the same sheet later; it is there for reproducibility, not cryptographic strength, and a seeded sheet is deterministic rather than unpredictable.

For how randomness is produced across the whole site, see how Generate Random works.

Limitations and good to know

There are no diagrams. Each configuration is described in words, and the parallel-line questions in particular are worth sketching before answering.
The parallel-line questions name the relationship for you — corresponding, alternate or co-interior. Working out which one applies from a picture is the harder skill and is not what this asks.
Angles are whole degrees throughout. Questions using minutes and seconds, or requiring a calculator, are a different topic.

Common mistakes

Mixing up corresponding and alternate angles: Corresponding angles sit in matching positions (an F shape); alternate angles sit on opposite sides of the transversal (a Z shape). Both are equal, and naming the wrong one loses the reasoning mark.
Assuming a diagram is drawn to scale: It usually is not. Work from the stated values and the angle facts, never from how the picture looks.