The first steps in determining the perimeter of triangle ABC are shown.
(-23)
796
6-
5
4
192
-54-3-2-1₁
+23 7 4
-2-
-3
4
-5
B
(1.3)
2 3 4 5
C (1.-2)
X
AB=3
BC=5
CA=√(1+2)²+(-2-3)²
- √(3)²+(-5)²
To the nearest whole unit, what is the perimeter of triangle ABC?