Question

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

Answer 1

Answer:The correct answer is :

34.8 + b = 54.6

Explanation:

The perimeter of the scalene triangle = Sum of length of all sides

Given that perimeter of the scalene triangle = 54.6 cm

a = 8.7 cm , c = 26.1 cm

a + b + c= 54.6 cm

8.7 cm + b + 26.1 cm= 54.6 cm

34.8 cm+b = 54.6 cm

From the given options the correct answer is:

34.8 cm+b = 54.6 cm

Answer 2

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`