1. MAT 142 Lecture Video Series

2. Perimeter and Area

3. Objectives Calculate the area of given geometric figures. Calculate the perimeter of given geometric figures. Use the Pythagorean theorem to find the lengths of a side of a right triangle. Solve word problems involving perimeter, area, and/or right triangles.

4. Vocabulary polygon perimeter area trapezoid parallelogram triangle rectangle circle circumference radius diameter legs (of a right triangle) hypotenuse

5. Area Formulas Triangle Rectangle and Parallelogram Trapezoid Heron’s Formula for Area of Triangle

6. Circle Formulas Circumference (Perimeter) Area

7. Pythagorean Theorem For right triangles a b c

8. Find the perimeter and area of the figure below

9. Find the area of the figure below

14. Find the length of the third side of the triangle below

15. Find the perimeter and area of the circle below

16. Find the perimeter and area of the semicircle below

17. Walk 100 yards south, then 120 west and then 30 yards south. How far from the original starting point are you?

18. Creator and Producer Elizabeth Jones for The School of Mathematical and Statistical Sciences at Arizona State University Videographer Mike Jones ©2009 Elizabeth Jones and School of Mathematical and Statistical Sciences at Arizona State University