Students roll a painted wheel and lay its diameter along the trail it leaves: three fit, plus the same little bit on every wheel. That number is pi, and they use it to predict the next wheel's trip with C = π × d.
Subject
Math
Grades
7
Time
8 min
Skill
Pi as a ratio, and the circumference formula
Standards it covers
7.G.B.4Know the circumference formula, C = π × d, and use it to find how far a wheel goes in one turn.