Thinking Summary · Step 1
Mastered[object Object]
[Discovery] A space-station running track is a 10 m long rectangle with two semicircles bulging from the short ends (radius 3 m). Tap all three regions to shade the full track silhouette, then enter the total area. (π ≈ 3.14)
Step 1
Active Step[Discovery] A space-station running track is a 10 m long rectangle with two semicircles bulging from the short ends (radius 3 m). Tap all three regions to shade the full track silhouette, then enter the total area. (π ≈ 3.14)
Composite Figure
Tap the regions to shade, then enter the area. Outer side = 10, radius = 3.
Tip: green = shaded, blue = unshaded. Tap a region again to unshade it.