AI Tutor

Premium Lesson

Upgrade to unlock this lesson, practice questions, and your personal tutor.

This lesson is part of a track

Public learning track

Area of Circles, Sectors, and Composite 2D Shapes

7th Grade · Math · Open Global Math

7 lessons

Goal

Derive circle area, calculate sector and segment areas, and solve perimeter and area for composite plane figures.

7 lessons
0 of 7 done
  1. Deriving the Formula for the Area of a CircleUp next
  2. Calculating Areas of Circles and AnnuliNot started yet
  3. Area of Composite Figures: Sectors of CirclesNot started yet
  4. Calculating Areas of Circular SegmentsNot started yet
  5. Area and Perimeter of Composite Figures with Circles and SectorsNot started yet
  6. Calculating Areas of Polygons with Subtracted RegionsYou are here
  7. Solving Real-World Composite Area and Perimeter ProblemsNot started yet
View full track

Learning standards covered

GlobalOGM.8.GEO.9Open Global Math Standards 2026™ · 7th Grade

Calculate perimeter and area of composite two-dimensional figures composed of triangles, quadrilaterals, regular polygons, semicircles, and quarter circles.