Give students a complete lesson on composite area when regions are removed (windows, doors, and cutouts). Build mastery of composite area by subtraction with classwork, warm-up, homework, and full teacher keys. Also check out my lesson on composite area with adding.What’s IncludedNotes & Classwork (pp. 1–5):Real-life paint problems with windows/doors removed (see p. 1–2).Shaded regions mixing rectangles, triangles, trapezoids, parallelograms (pp.3–5).Warm-Up / Do Now (p. 6):Finding area, fin