Question

Suppose a triangle is drawn on a coordinate plane. Using vertices with the coordinates (1, 1)
, (4, 1)
, and (5, 4)
, compute the perimeter. Round your answer to the nearest tenth.(1 point)
Responses

11 units
11 units

11.2 units
11.2 units

10.5 units
10.5 units

12 units
12 units

Answer 1

Distances: (1,1)-(4,1)=3, (1,1)-(5,4)=5, (4,1)-(5,4)=√10 ≈ 3.1623.
Perimeter = 3 + 5 + √10 ≈ 11.1623 → 11.2 units.