Course:MATH230/Archive/2010-2011/101/groups/group01
Appearance
Group 1
Geometry
Triangles
- The inner angles of an triangle all add to make 180 degrees
- The Area of the Triange is base(b)times hight(h) divided by 2
--> Area = (base x hight) / 2
- An Isosceles triangle only has 2 equal sides out of the three that make up a triangle
- With an Equilateral triangle, all 3 sides are equal
- With a Scalene triangle, all 3 sides are different
Squares and Rectangles
- All inner angles of a square or rectangle will add to 360 degrees
- The Area of a Square is length(l)times width(w) or Length squared
--> Area = l x w
- A square can be a rectangle but a rectangle cannot be a square
Circles
- Area of a circle is pie (3.14) times the radius(r) squared
- the radius is the length from the middle of the circle to the side of the circle
- The diameter of a circle is two times pie(3.14) times the radius(r)
C = 2 x 3.14 x r
Parallel lines and Angles
- if you have two lines that are parallel it means that the two lines will never meet - if you have a line bisecting two parallel lines, the inner angles of the angular "c" looking shape will add to equal 180 degrees - The interior angles of the "z" looking shape will be the same