Polygons on the Coordinate Plane

Polygons on the Coordinate Plane

How can you find the perimeter of a polygon on the coordinate plane?

How can we solve this problem?

1. Plot the points and create the rectangle.

2. Find the Length

3. Find the Width

4. Find the Perimeter

-I know that if the top is 5, then the bottom is 5.

-I know that is the right is 9, then the left is 9.

4. Find the Perimeter

Perimeter = Picture Frame (The outside edges of the shape).

Multiple Choice

Rectangle JKLM:

J(-3,8), K(-3,-1), L(4,-1), M(4,8)

What is the Length (JM & KL) of this rectangle?

• 1

• 4

• 7

• 11

Multiple Choice

Rectangle JKLM:

J(-3,8), K(-3,-1), L(4,-1), M(4,8)

What is the Width (JK & ML) of this rectangle?

• 3

• 4

• 7

• 9

Multiple Choice

Rectangle JKLM:

J(-3,8), K(-3,-1), L(4,-1), M(4,8)

What is the perimeter of this rectangle?

(JK + KL + LM + MK)

• 18 units

• 14 units

• 32 units

• 63 units

Multiple Choice

Rectangle WXYZ:

W(-3,-2), X(4,-2), Y(-3,-5), Z(4,-5)

What is the perimeter of this rectangle?

(WX + XY+ YZ + ZW)

• 6 units

• 20 units

• 14 units

• 21 units

Multiple Choice

Rectangle EFGH:

E(-9,10), F(-9,2), G(6,2), H(6,10)

What is the perimeter of this rectangle?

(EF + FG + GH + HE)

• 46 units

• 120 units

• 30 units

• 16 units

Poll

How do you feel about finding the Perimeter of a Polygon on the Coordinate Plane?

• Great!

• So-So

• Confused