C1. Triangle Area Proofs | Perimeter and area. Area of triangles. C2. Shaded areas. C3. Area of diagonal generated triangles of rectangle are equal | Perimeter and area. Quadrilaterals. C1. Area of quadrilaterals and polygons. C2. Area and perimeter of rectangles word problems. Area Shapes Game - Geometry: Math Games. C3. Area of strange quadrilateral | Area. Area of a kite | Area. Area of a trapezoid | Area. N-Sided Polygons. C1. Area of quadrilaterals and polygons.
C2. C3. Area by breaking up shape | Area. Finding area by rearranging parts | Area. Circles. C1. C2. Area and circumference of circles. C3. Area of a circle. Circumference from area.