Obj: to use ratios to solve problems

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Presentation transcript:

Obj: to use ratios to solve problems

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

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

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