1. Obj: to use ratios to solve problems

2. Ratio of triangles to no triangles is 3:5
No triangles to triangles is 5:3
What fraction has triangles in it?
3/8 = 3:8 or 3 to 8

3. Ex. 1 AB : BC is 2:3 ; AC = 40, find BC AB : BC 2:3 2x: 3x 2x + 3x= 405 5
X= 8
BC = 3x =24
BC is 24

4. Example #2
The Width of a rectangle is 4/5 of the length. If the perimeter is 36 Ft. find the Dimensions
Width: Length
4:5
4x:5x
2(4x)+2(5)=36
8x+10x=36
Multiply 2 by the 5 and the 4 to get the dimensions
18x=36
18=18
8ft x 10ft
X=2