The perimeter of the scalene triangle is 54.6 cm.

Which equation can be used to find the value of b if side a measures 8.7 cm?

8.7 + b = 54.6

17.4 + b = 54.6

26.1 + b = 54.6

34.8 + b = 54.6

Which equation can be used to find the value of b if side a measures 8.7 cm?

8.7 + b = 54.6

17.4 + b = 54.6

26.1 + b = 54.6

34.8 + b = 54.6

**the correct question is**

The perimeter of the scalene triangle is \( 54.6 \) cm.

Which equation can be used to find the value of b if side a measure \( 8.7 \) cm and side c measure \( 26.1 \) cm?

we know that

the perimeter of a triangle is equal to

\( P=a+b+c \\ P=54.6 cm \) equation 1

\( P=a+b+c \\ P=8.7+26.1+b \) equation 2

equate equation 1 and equation 2

\( 54.6=(8.7+26.1)+b \\ 54.6=34.8+b \)

therefore**the answer is the option D****\( 34.8 + b = 54.6 \)**

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