126 BPM
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4/4 ×2
Drag rhythmic values into up to 8 beat blocks per line to build a drum groove, or click a tile then click a block to place it — handy on a trackpad.
Math skill: Angle Relationships from Triangle Sums and Parallel Lines Cut by a Transversal (8.G.A.5)
How the beat teaches it: Every slot uses either the triangle angle sum (180°) or a rule for angles formed by a transversal crossing parallel lines — work out the missing angle, then build it anywhere in the kit.
This is lesson 22 of 24 in RockBlocks Math, Grade 8, a free course where every lesson turns a math idea into something you can count, hear, and play. The previous lesson, “Similar Figures and Scale Factor,” covered similarity and Scale Factor (8.G.A.4). Next is Lesson 23, “Scatter Plots and Lines of Best Fit.”
Every slot above (A, B, C, D) is its own question, and it’s a real, blank RockBlocks beat the whole time — the same drag-and-drop tiles, kit, tempo, sheet music, and drummer view as anywhere else on the site. Tap ❓ Questionin the corner to read the current slot’s problem, build your answer right in the grid, then tap ✓ Check Answerto grade it. Once you’re done, keep going: expand the beat, drop it into a Stack, or save a copy to your own page — nothing here overwrites the lesson itself, so every visitor still starts from the same blank slots.