Math Problem Statement

Graph the following figure in the coordinate plane. Find the perimeter. X(0, 2), Y(3, -2), Z(-5, -2). Choose the correct graph. The perimeter of ΔXYZ is __ units (Simplify your answer. Round to one decimal place as needed).

Solution

Let's break down the task from the image:

We are asked to graph the triangle formed by points X(0,2)X(0, 2), Y(3,2)Y(3, -2), and Z(5,2)Z(-5, -2), and calculate its perimeter.

The figure shows that the correct graph is option CC. To find the perimeter, we need to calculate the distances between the points XX, YY, and ZZ using the distance formula.

Distance Formula:

For two points (x1,y1)(x_1, y_1) and (x2,y2)(x_2, y_2), the distance between them is: d=(x2x1)2+(y2y1)2d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

1. Distance XYXY:

Points: X(0,2)X(0, 2), Y(3,2)Y(3, -2) dXY=(30)2+(22)2=32+(4)2=9+16=25=5d_{XY} = \sqrt{(3 - 0)^2 + (-2 - 2)^2} = \sqrt{3^2 + (-4)^2} = \sqrt{9 + 16} = \sqrt{25} = 5

2. Distance YZYZ:

Points: Y(3,2)Y(3, -2), Z(5,2)Z(-5, -2) dYZ=(53)2+(2(2))2=(8)2+02=64=8d_{YZ} = \sqrt{(-5 - 3)^2 + (-2 - (-2))^2} = \sqrt{(-8)^2 + 0^2} = \sqrt{64} = 8

3. Distance XZXZ:

Points: X(0,2)X(0, 2), Z(5,2)Z(-5, -2) dXZ=(50)2+(22)2=(5)2+(4)2=25+16=416.4d_{XZ} = \sqrt{(-5 - 0)^2 + (-2 - 2)^2} = \sqrt{(-5)^2 + (-4)^2} = \sqrt{25 + 16} = \sqrt{41} \approx 6.4

Perimeter:

Now, we sum the distances: Perimeter=dXY+dYZ+dXZ=5+8+6.4=19.4 units\text{Perimeter} = d_{XY} + d_{YZ} + d_{XZ} = 5 + 8 + 6.4 = 19.4 \text{ units}

The perimeter of triangle ΔXYZ\Delta XYZ is approximately 19.4 units.

Would you like further details or explanations on this? Here are 5 related questions to consider:

  1. How do you calculate the area of a triangle using its vertices?
  2. What is the significance of the distance formula in coordinate geometry?
  3. Can you describe the properties of isosceles and equilateral triangles based on side lengths?
  4. How does the midpoint formula relate to the distance formula?
  5. What role do slopes play in analyzing the shape of a triangle in the coordinate plane?

Tip: Always check if a triangle is right-angled using the Pythagorean theorem when you know the lengths of its sides.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Distance Formula
Perimeter Calculation

Formulas

Distance Formula: d = sqrt((x2 - x1)^2 + (y2 - y1)^2)
Perimeter of a triangle: Sum of the lengths of all sides

Theorems

Pythagorean Theorem (for distance calculation in coordinate planes)

Suitable Grade Level

Grades 9-12