Aim the observatory arm and read its opening against the corner square — acute, right, or obtuse.
The observatory arm opens to an angle, and the child reads it against a right-angle reference square to classify it — acute (smaller), right (square), or obtuse (wider). Comparing to 90° builds angle sense. Best for Grades 4–6.
A free, no-signup, no-ads math game for Grades 4–6 — practising angles, acute-right-obtuse, classify-angles, right-angle, geometry. Play in your browser on the KidsDoMath games hub or explore more Geometry & Shapes games.
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What math does Angle Aim practice? Angle Aim practices Angles, Acute Right Obtuse, Classify Angles, Right Angle. The observatory arm opens to an angle, and the child reads it against a right-angle reference square to classify it — acute (smaller), right (square), or obtuse (wider).
What grade is Angle Aim for? Angle Aim is built for Grades 4–6 (ages 9–12). It sits in the Geometry & Shapes strand, and it ramps across 8 levels so younger or older players find their own pace.
How do you play Angle Aim? Aim the observatory arm and read its opening against the corner square — acute, right, or obtuse.
Is Angle Aim free to play? Yes. Angle Aim is free, with no ads and no sign-up, and it runs in the browser on a phone, tablet or computer.