What are similar figures and how can similar figures be used in real life? ?

Question

There is a lot of discussion in the text about similar figures. What are similar figures and how can similar figures be used in real life?

Answer 1

Similar Figures are shapes resemble each other but are different. they have a relation ship that is a ratio. suppose that we had a triangle with A=30 B=40 and C=50 and there was a triangle with side D=15 and had to figure out E and F.

then we would use ratios to figure them out knowing that they are proportional by ratio.

A/B=D/E

30/40=15/E

30E=600

E=20

then from here we can figure out F

A/C=D/F

30/50=15/F

30F=750

F=25

Remember when making ratios that there are only pairs and these pairs are represented in a picure usually

for this example the pairs would be A=D, B=E, C=F

Answer 2

Most obvious use of "similar figures in real life" ?  a map

The layout of everything is the same as the real thing,

but at a scale of "one inch = 10 miles" or whatever it happens to be.

The shape of the states on a US map is _similar_

to their real shapes (curvature of the earth notwithstanding).

And similarly with a street map or any other.

Another example: building or architectural plans.

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