Circle Circumference Perimeter Worksheet B The single A

Circle – Circumference & Perimeter – Worksheet B The single A 4 worksheet requires accurate scaling and has answers. The split worksheet does not and does not include answers. IMPORTANT! This worksheet relies on accurate scales. See next slide for printing instructions.

IMPORTANT! This worksheet relies on accurate scales. When printing, ensure ‘Scale to Fit Paper’ is deselected. Click: ‘Full Page Slides’ > Deselect ‘Scale to Fit Paper’

1) Measure the perimeter of each inscribed (inside) and circumscribed (outside) polygon. 2) Calculate the mean perimeter. 3) Use the formula (circumference ÷ diameter) to approximate pi.

Circumference Diameter “How many diameters in one circumference? ” Polygon Perimeters (cm) Diameter A Circle Inscribed Polygon Circumscribed Polygon Mean Approximation for Pi A 4. 2 × 4 16. 8 6 × 4 24 20. 4 3. 4 B B C D

Circumference Diameter “How many diameters in one circumference? ” Polygon Perimeters (cm) Diameter A C Circle Inscribed Polygon Circumscribed Polygon Mean Approximation for Pi A 4. 2 × 4 16. 8 6 × 4 24 20. 4 3. 4 B 3. 6 × 5 18 4. 4 × 5 22 20 3. 33 C 3 × 6 18 3. 5 × 6 21 19. 5 3. 25 D 2. 3 × 8 18. 4 2. 5 × 8 20 19. 2 3. 2 B D

Circumference Diameter “How many diameters in one circumference? ” Polygon Perimeters (cm) Inscribed Polygon Circle Diameter A A B B C D Circumscribed Polygon Mean Approximation for Pi

Circumference Diameter “How many diameters in one circumference? ” Polygon Perimeters (cm) Circle Inscribed Polygon Circumscribed Polygon A B C D E F Which approximation do you think is most accurate? Is there a trend in the approximations? Mean Approximation for Pi

A C B D F E

Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated . Please feel free to email: tom@goteachmaths. co. uk