Ages 9–10🧮 Mathematics12 verified questions on this shelf

Angle Sum Rules

Know that angles at a point sum to 360° (one whole turn), angles on a straight line sum to 180°, and vertically opposite angles are equal; use these facts to find missing angles

Try three questions

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Question 1 of 3

Sam draws two straight roads that cross each other at a right angle, forming four corner angles at the intersection. Each corner is a right angle. What is the total number of degrees around the intersection?

Question 2 of 3

At the center of a playground carousel, four angles meet: ∠A, ∠B, ∠C, and ∠D. ∠A and ∠C are right angles. ∠B is twice as large as ∠D. What is the measure of ∠B?

Question 3 of 3

Angle ABC is divided into two adjacent, non‑overlapping angles ABD and DBC. If angle ABD measures 30° and angle DBC measures 45°, what is the measure of angle ABC?

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Skill names and descriptions include the Marble Skill Taxonomy © Generative Spark, Inc. (withmarble.com), licensed under ODbL 1.0 (database) and CC BY-SA 4.0 (content). Practice questions are GlowGrades's own, each checked by independent verifiers that must agree before a child ever sees it.