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The perimeter of the equilateral triangle drawn below is 9b + 12. The shape below is made of four of these triangles. Find a simplified expression for its perimeter.
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41 votes
41 votes
The perimeter of the equilateral triangle drawn below is 9b + 12.

The shape below is made of four of these triangles.

Find a simplified expression for its perimeter.

The perimeter of the equilateral triangle drawn below is 9b + 12. The shape below-example-1
User Ged Byrne
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2 Answers

28 votes
28 votes
Not sure but 4(9b+12)= 36b+48
User Clarus Dignus
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7 votes
7 votes
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
User PlagTag
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