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# math symbol help

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what does ~ mean in geometry when referring to triangles?

May 23, 2019

#1
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△ABC ~ △DEF   means   "triangle ABC is similar to triangle DEF."

If you take a triangle and multiply each of its sides by some number, you will get a similar triangle.

For example: If you take  △ABC  and multiply each of its sides by 2, you will get  △DEF.  So  △ABC ~ △DEF

( Also note that the order of the letters in the triangle name matters.

For example, in this case it is NOT true that  △ABC ~ △FDE )

May 23, 2019

#1
+3

△ABC ~ △DEF   means   "triangle ABC is similar to triangle DEF."

If you take a triangle and multiply each of its sides by some number, you will get a similar triangle.

For example: If you take  △ABC  and multiply each of its sides by 2, you will get  △DEF.  So  △ABC ~ △DEF

( Also note that the order of the letters in the triangle name matters.

For example, in this case it is NOT true that  △ABC ~ △FDE )

hectictar May 23, 2019
#2
+1

thanks!

May 28, 2019