Respuesta :

Add the three numbers.

The magical thing about triangles is if they have 3 angles that are the same then 100% they will be the same lengths.

Annnnnd if you open the sum of the 3 angles more than 180degrees then it wouldn’t be a triangle anymore, the lines will open up.

Perimeter is just a fancy way of saying what’s the outside length/distance.

52+30+40 = 122
5.2 * 9 = 46.8

hope this help

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