Question

The perimeter of a triangle ABC is 12 3/4 m. If AB=4 1/3m, BC=5 1/4m, find AC

Answer 1

Perimeter of the triangle is: P=12 3/4 m=51/4 m.
AB=4 1/3 m=13/3 m and BC=5 1/4 m=21/4
P=AB+BC+AC
or, 51/4=13/3+21/4+CA
or, AC=51/4-(13/3+21/4)
or, AC=51/4-(52+63)/12
or, AC=51/4-115/12
or, AC=(153-115)/12
or, AC=38/12
or, AC=19/6
or, AC=3 1/6 m Ans.

Answer 2

Answer:

Perimeter of the triangle is: P=12 3/4 m=51/4 m.

AB=4 1/3 m=13/3 m and BC=5 1/4 m=21/4

P=AB+BC+AC

or, 51/4=13/3+21/4+CA

or, AC=51/4-(13/3+21/4)

or, AC=51/4-(52+63)/12

or, AC=51/4-115/12

or, AC=(153-115)/12

or, AC=38/12

or, AC=19/6

or, AC=3 1/6 m Ans.