Students connect circle formulas to visual models by matching diagrams to their area and circumference values. Learners drag the correct calculation under each circle, reinforcing understanding of radius, diameter, and pi in real computations. This activity supports TEKS 7.9.B (determine area and circumference of circles) and aligns with Common Core 7.G.B.4.
Skills: area calculation, circumference calculation, geometric formulas, mathematical reasoning. Grades 7-9.