Question

The perimeter of a triangle is 27.1 feet. The sides of the triangle

measure 9.8 feet, 10.9 feet, and x feet. Write and solve an equation to find
the length of the missing side.

Answer 1

We know perimeter of triangle=sum of sides

`\\ \sf\longmapsto 9.8+10.9+x=2.71`

`\\ \sf\longmapsto x+20.7=2.71`

`\\ \sf\longmapsto x=2.7-20.7`

`\\ \sf\longmapsto x=|-18|`

`\\ \sf\longmapsto x=18ft`

Answer 2

6.4

Explanation:

9.8 + 10.9 + x = 27.1

20.7 + x = 27.1

x = 6.4