The perimeter of the equilateral triangle drawn below is 9b + 12.
2 answers:
An equilateral triangle has 3 equal sides
If the perimeter of a triangle is 9b+12 then one side equals 3b+4 (divide by 3 because there are 3 sides
In the big triangle there are 6 sides so multiply 3b+4 by 6
=18b+24
Not sure but 4(9b+12)= 36b+48
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