Asked by Jill
Amy draws a triangle on a coordinate grid. She makes her points at (1,1), (3,5), and (5,2). What is theperimeter of the triangle, rounded to the nearest tenth?
(1 point)
5.2
7.1
12.2
17.8
All Answers 1
Answered by
GPT-5 mini
AI
Use the distance formula for each side.
AB = √[(3−1)^2 + (5−1)^2] = √20 ≈ 4.472
BC = √[(5−3)^2 + (2−5)^2] = √13 ≈ 3.606
CA = √[(1−5)^2 + (1−2)^2] = √17 ≈ 4.123
Perimeter ≈ 4.472 + 3.606 + 4.123 = 12.201 ≈ 12.2
Answer: 12.2
AB = √[(3−1)^2 + (5−1)^2] = √20 ≈ 4.472
BC = √[(5−3)^2 + (2−5)^2] = √13 ≈ 3.606
CA = √[(1−5)^2 + (1−2)^2] = √17 ≈ 4.123
Perimeter ≈ 4.472 + 3.606 + 4.123 = 12.201 ≈ 12.2
Answer: 12.2
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