the ratio of the sides of a tright GhI to the corresponding sides triangle jkl is 5 to 4. if the perimeter of triangle jkl is 60 cm then what is teh perimeter of the triangtle ghi.
side gh correspond to side jk
side hi correspons to side kl
side gi corresponds to side jl
2007-01-14 09:39:49 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
perimeter of GHL=5/4*60=75 cm
2007-01-14 09:46:16 · answer #1 · answered by raj 7 · 0⤊ 0⤋
To work out a ratio you devide the ratios together and times it by the mesurement.
In your example you have a ratio of 5:4 ghl to jkl
5/4*60 = 75 cm
as you are going from the smaller (4) to the larger (5)
if you wanted to scale the mesurement from jkl to ghl it would be
4/5*60 = 48cm
this is just a short hand way of saying;
60/4 = 15 * 5 = 75
60 is your original mesurement
60/4 works out what the mesurement is at this ratio
15*5 works out what the mesurement would be scaled up.
2007-01-14 17:50:52 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Let
p1 = perimeter of Îghi
p2 = perimeter of Îjkl
Given
p1/p2 = 5/4
p2 = 60 cm
Find p1
p1/p2 = 5/4
p1 = (5/4)p2 = (5/4)(60) = 75 cm
2007-01-14 18:27:52 · answer #3 · answered by Northstar 7 · 0⤊ 0⤋
72 cm because 60 / 5 gives you 12 so you add 12 to your 60 cm giving you 72 because of the ratio..
2007-01-14 17:46:40 · answer #4 · answered by blazncaczn 3 · 0⤊ 0⤋
First, you need to type better.
I think the ratio of the perimeters is the same as the ratio of the sides. So
5/4=x/60
4x=300
x=75
The perimeter is 75 cm.
I think????????
2007-01-14 17:47:09 · answer #5 · answered by anonymousperson 4 · 0⤊ 0⤋