February+Percents++Chapter+6

Chapter 5: Ratio an d P roportions Chapter 6: Percents [|Edu PlanBook] [] 2/2/10 Notes Test Review: Ch 5& 7 for Unit 5:

Unit 6: Geometry

= **Prefix** sides name =
 * = tri 3 =
 * = Quadri 4 sides, 4 angles (tetra-) =
 * = penta 5 sides, 5 angles (pentagon) =
 * = hexa 6 sides, 6 angles (hexagon) =
 * = hepta 7 sides, 7 angles(heptagon) =
 * = octa 8 sides, 8 angles (octagon) =
 * = nona 9 sides, 9 angles (nonagon) =
 * = deca 10 sides, 10 angles (decagon) =

= Review of Circles : =

= = =**Perimeter** is the distance around the outer edges. Add the lengths of all sides.= =(the perimeter of a circle is its circumference C= pi x d)= = **Formulas for Perimeter** = 2l + 2w= 2 pi r= 4s=
 * =Rectangles P=
 * =Circles: the **circumference** is the 'perimeter' of the circle C=pi d orC=
 * =Squares P=

= **Area** is the space with in the figure. The number of square units needed to cover a given surface.= =**Formulas for Area** = =Squares: A=side squared= s 2 = =Triangles: A=1/2 bh= =Circles: C=pi r 2 = =Rectangles: A=lw= length x width=

= = =[|Perimeter] and area explorer: [|Interactive]= =[|Area of a triangle]= =[|http://www.mathplayground.com/area_perimeter.html]= =[|http://www.mathplayground.com/geoboard.html]= =[]= =[]= =[]=

3 dimensional shapes Page with Actitivities