Question

Suppose a triangle is drawn on a coordinate plane. Using vertices with the coordinates (1, 1)
(
1
,

1
)
, (4, 1)
(
4
,

1
)
, and (5, 4)
(
5
,

4
)
, compute the perimeter. Round your answer to the nearest tenth.(1 point)
Responses

11.2 units
11.2 units

12 units
12 units

11 units
11 units

10.5 units

Answer 1

Compute the side lengths:
- AB between (1,1) and (4,1): 3
- BC between (4,1) and (5,4): sqrt(1^2+3^2)=√10 ≈ 3.1623
- AC between (1,1) and (5,4): √(4^2+3^2)=5

Perimeter = 3 + √10 + 5 = 8 + √10 ≈ 11.1623 → rounded to the nearest tenth: 11.2 units.