Teddyr
Answered

Find the simplest expression for the perimeter of the triangular roof truss.


side 1: 3a+4


side 3: 2a-7


side 2: 9a+11

Verified Answer :

eternal3fear

perimeter of triangle = all sides added up
3a + 4 + 2a - 7 + 9a + 11

now add like terms
3a + 2a + 9a = 5a + 9a = 14a

4 - 7 + 11
= -3 + 11 = 8

so we have  14a + 8
as our simplest expression

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