138 BPM
Loading drum sounds…+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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: Relate a Polygon's Side Count to Its Interior Angle Sum (G-CO.C.10)
How the beat teaches it: The reason an n-sided polygon's interior angles sum to (n - 2) × 180° is that you can split it into (n - 2) triangles from one vertex — every slot gives you that (n - 2) as the note count, but the block count is the polygon's actual side count, so building the answer literally puts you in an n-beat bar.
This is lesson 6 of 24 in RockBlocks Math, Grade 10, a free course where every lesson turns a math idea into something you can count, hear, and play. The previous lesson, “The Exterior Angle Theorem,” covered find an Exterior Angle from the Two Remote Interior Angles (G-CO.C.10). Next is Lesson 7, “Triangle Congruence and CPCTC.”
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.