Thinking Summary · Step 1
Mastered[object Object]
[Discovery] Tap each face of the 12×9×7 prism net to count all 6 rectangles and add up the surface area.
Step 1
Active Step[Discovery] Tap each face of the 12×9×7 prism net to count all 6 rectangles and add up the surface area.
Surface Net
Tap each face of the 12 × 9 × 7 prism to count its 6 faces.