# Math

posted by .

To the nearest tenth, find the perimeter of ABC with vertices A(-2-2), B(0,5) and C(3,-1).

• Math -

AB=sqrt{(x₂-x₁)²+(y₂-y₁)²} =
=sqrt{(0-(-2))²+(5-(-2)) ²} =
=sqrt(4+49)=7.3

BC = sqrt{(x₃-x₂ )²+(y₃-y₂)²} =
=sqrt{(3-0)²+(-1-5) ²} =
=sqrt(9+36)=6.7

CA = sqrt{(x₁-x₃ )²+(y₁-y₃)²} =
=sqrt{(-2-3)²+(-2+1) ²} =
=sqrt(25+1)=5.1

P=AB+BC+CA = 7.3+6.7+5.1 =14.1

• Math -

19.1 units

AB= 7.3
BC=6.8
CA=5

## Similar Questions

1. ### math

A quadrilateral has vertices P(3,5),Q(-4,3),R(-3,-2),and S(5,-4). Find the lengths of the diagonals,to the nearest tenth?
2. ### geometry

Find the approximate perimeter of triangle abc with vertices a(0,8 b(6,-2 c(-4,4
3. ### geometry

Triangle ABC is a right triangle such that m angle B= 90 degrees. If AC= 12 and BC=9, what is the perimeter of triangle ABC ?
4. ### geometry

Find the perimeter of the polygon using the distance formula of Triangle ABC with vertices A(3, 5), B(3, 1), C(0, 1)
5. ### algebra

Triangles ABC and DEF are similar. Find the perimeter of triangle DEF. Round your answer to the nearest tenth.
6. ### Geometry

The coordinates of the vertices of a quadrilateral are R(-1,3) S(3,3) T(5,-1), and U(-2,-1).Find the perimeter of the quadrilateral. Round to the nearest tenth.
7. ### math

the perimeter of a rectangle is 35.54 inches longer than the perimeter of a square of side 6.75 inches. Find the perimeter of the rectangle to the nearest tenth of an inch.
8. ### Geometry

The coordinates of the vertices of ABC are A(-2,2) B (5, -3) and C (-4,-1) Identify the perimeter of ABC. Round each length to the nearest tenth before adding. I am totally lost!
9. ### Math, Precalc

Find, to the nearest tenth of a degree, the angle formed by the two main diagonals of a cube that connect consecutive vertices of the lower base to the opposite consecutive vertices of the upper base, as illustrated at right.
10. ### Geometry

To the nearest tenth, find the perimeter of ΔABC with vertices A(2,4), B(-2,1) and C(2,1). Show your work.

More Similar Questions