Sectors: Arc Length & Area
by Anonymous
Adjust the radius and central angle to see how arc length and sector area scale with θ/360.
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About this app
An interactive middle-school math app for exploring sector geometry. Adjust the radius and central angle to see how arc length equals the circumference multiplied by θ/360, and how sector area equals the circle’s area multiplied by θ/360. Guided missions and a multiple-choice challenge reinforce semicircles, proportional shares, and the effect of doubling the radius.
Use cases
- Middle-school students learning sectors and circles
- Teachers demonstrating arc length and sector area
- Learners exploring how radius and central angle affect results
- Students practicing sector calculations with π = 3.14
Features
- Interactive radius and central-angle controls
- Visual sector diagrams for arc length and area
- Guided missions with reset and next controls
- Step-by-step formula and proportional-share explanations
- Four-question multiple-choice challenge with answer streak tracking