Grade 4 — Geometry (Angles & Lines)

Interactive practice • challenge problems • speed quiz • tutorial video • CSV download

Intro & Concept

Angles measure how far one line turns from another. Lines can be parallel, perpendicular, or intersecting. Common angles: acute <90°, right = 90°, obtuse >90°.

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Animated Tutorial Video

Click Play to watch examples of angles and lines. Captions appear on the canvas and will be included in the downloaded video.

Interactive Practice

1) Identify angle: 45°
2) Identify angle: 90°
3) Identify lines: never meet
4) Lines intersect at right angle

Random Challenge

⚡ Speed Quiz

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Download CSV Log

Track all practice & quiz answers in a CSV file.