Olibits / Math / Angles — Enrichment
Primary 4 Math: Angles — Enrichment Practice
Real Primary 4 Math questions on Angles — Enrichment, pulled directly from the Olibits question bank — the same questions a child would actually see, not separately written for this page.
MOE strand: Measurement and Geometry
Curriculum alignment
Mathematics Syllabus, Primary One to Six (MOE, 2021 syllabus)
Taught across P1–P6.
Olibits is an independent learning platform and is not affiliated with or endorsed by the Ministry of Education. See our FAQ for the full breakdown.
Enrichment topic. This goes beyond what the MOE syllabus asks at this level. It is offered as extra practice, not as syllabus coverage.
Real Angles — Enrichment practice questions
A spinning office chair is turned through 310°. What type of angle is this?
Acute
Obtuse
Reflex ✓
Right
An angle of 310° is classified as reflex: acute angles are less than 90°, right angles are exactly 90°, obtuse angles are between 90° and 180°, straight angles are exactly 180°, and reflex angles are between 180° and 360°.
A garden sprinkler rotates through 260° with each sweep. What type of angle is this?
Right
Acute
Reflex ✓
Obtuse
An angle of 260° is classified as reflex: acute angles are less than 90°, right angles are exactly 90°, obtuse angles are between 90° and 180°, straight angles are exactly 180°, and reflex angles are between 180° and 360°.
On a protractor, which type of angle measures between 180° and 360°?
Right angle
Acute angle
Straight angle
Reflex angle ✓
A reflex angle is greater than 180° but less than 360°.
A robotic arm rotates through 200° to reach an object. What type of angle is this?
Obtuse
Right
Reflex ✓
Acute
An angle greater than 180° but less than 360° is a reflex angle.