Asked by sally
Triangles ABC and DEF are similar. Find the perimeter of triangle DEF. Round your answer to the nearest tenth.
ab=4ft
bc=6ft
ac=5ft
de=6ft
ef= 9ft
there is no feet given for df
Please can anyone help me solve this with steps I don't understand how to do this. Thanking you in advance for any assistance.
ab=4ft
bc=6ft
ac=5ft
de=6ft
ef= 9ft
there is no feet given for df
Please can anyone help me solve this with steps I don't understand how to do this. Thanking you in advance for any assistance.
Answers
Answered by
Knights
Similar triangles have similar ratios
DE / AB = 6/4 = 3/2
EF/BC = 9/6 = 3/2
So we know that DF / AC = 3/2
We are given that AC = 5
So, DF / 5 = 3/2
We cross multiply to get 15 = DF x 2
So, DF = 15/2
And, to the nearest tenth it is equal to
7.5
DE / AB = 6/4 = 3/2
EF/BC = 9/6 = 3/2
So we know that DF / AC = 3/2
We are given that AC = 5
So, DF / 5 = 3/2
We cross multiply to get 15 = DF x 2
So, DF = 15/2
And, to the nearest tenth it is equal to
7.5
Answered by
Knights
(Meaning 7.5 was the answer sorry if I was unclear)
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