This document discusses the formulas for calculating the areas of various geometric shapes including squares, rectangles, triangles, trapezoids, rhombi, circles, and pentagons. It notes that the area of a square is the side length squared, a rectangle is base times height, and a triangle is one-half the base times height. It also provides the formulas to calculate the areas of trapezoids, rhombi and circles, and mentions regular pentagons can be calculated using the length of any side and number of sides. The document emphasizes that understanding these area formulas is important as these shapes are seen every day.

1. Let’s talk about shapesAreas of Geometric Figures

2. The Basics…SquareArea = (side length)^2RectangleArea = base x height

3. The TriangleArea = (1/2) x base x heightTwo triangles make a rectangle,that’s where we get the formula

4. TrapezoidsArea = (1/2) x height x (base1 + base 2)

5. RhombusProperties:4 sides

6. Two diagonals run from one corner to the opposite

7. Area = (1/2) x diagonal1 x diagonal2CirclesWe need pi for this one. or

8. Pi = 3.14159265358979323846 = Area = (radius)^2 x Radius = distance from center to edge of circle

9. PentagonswhereS is the length of any sideN is the number of sidesMore help: http://www.mathopenref.com/polygonregulararea.html

10. But why is this Important?!?!?!