Table of Contents

1. Triangle and Quadrilateral Angles and Sides
   1. Triangle Angle Sum Theorem
   2. Animation 2
   3. Sum of interior angles of quadrilaterals
   4. Triangle Inequality
2. Area Review
   1. Area and Perimeter of a Rectangle
   2. Parallelogram: Area
   3. Area of a Triangle (Discovery)
   4. Triangle Area Action!!! (V2)
   5. Area of a Trapezoid
   6. area of a trapezoid
   7. Area of Trapezoid - Midsegment
   8. Area of Trapezoid - Triangles
   9. Area of a Trapezoid
   10. Triangle Area Calculated via Rotation
3. Cross Sections
   1. Sections of Triangular Prisms
   2. Cross Section? (1)