8.2 Outline
- Rectangles
- define area
- define square unit
- formulas
- rectangle
- square
- Parallelograms
- definition
- formula
- derivation of formula
- Triangles
- formula
- derivation of formula
- Trapezoids
- definition
- formula
- derivation of formula
- Circles
- formula
- derivation of formula
- Applications
- conversion application
- acre definition
- conversion of acres to square feet
8.2 Essential Ideas
Area is the number of squares which will fit inside a given figure.
Some common area formula for area are:
rectangle; A = lw
square; A =s2
parallelogram; A=bh
triangle; A= (1/2)bh
trapezoid; A= (1/2)h (b +B)
circle; A= πr2
acre; A = 43,560 ft2