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TEACHER-GUIDE-VERIFIED · TG-V9-012

1. A circular crater has diameter 18 km. Find its circumference using pi = 3.1416.

Verified solution

Solution: C = pi d = 3.1416(18) = 56.5488, about 56.55 km.

Source: Teacher Guide V9 · English V9. Match the numbers and wording in your printed question before using this solution.

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VIDEO HELP · TG-V9-012

Find a Crater's Circumference | Diameter 18 km (TG-V9-012)

Use the specified π = 3.1416 and diameter 18 km to calculate the crater circumference: 56.5488 km, or about 56.55 km. Distinguish diameter from radius, round to hundredths, and check the result.

Space Math Explorers · approved worked example · 3:27 · Watch on YouTube

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These pages reproduce verified solution steps for the registered V9 questions. It does not diagnose learning needs or replace instruction from a qualified teacher or tutor.