Question

If the perimeter of the scalene triangle is 54.6cm which equation can be used to find the value of b if side a measures 8.7cm

Answer 1

A triangle has three sides which can be named as :

a, b and c.

Perimeter = a + b + c

a = 8.7

Perimeter = 54.6cm

54.6 = b + 8.7 + c

54.6 - 8.7 = b + c

45.9 = b + c

b = 45.9 - c

Answer 2

Answer:

The side b=45.9-c

Step-by-step explanation:

Given : Perimeter of the scalene triangle = 54.6 cm and side measure a=8.7 cm

To find : The side b value ?

Solution :

Let the three sides of triangle = a,b and c.

Perimeter of scalene triangle $P=a+b+c$

where a = 8.7 and perimeter = 54.6 cm

Substitute the value $P=a+b+c$

$54.6=8.7+b+c$

$54.6-8.7=b+c$

$45.9=b+c$

$b=45.9-c$

Therefore, The side b=45.9 -c