**Area and perimeter in the coordinate plane worksheet :**

Worksheet on area and perimeter in the coordinate plane is much useful to the students who would like to practice problems on two dimensional shapes in the coordinate plane.

Let us look at "Area and perimeter in the coordinate plane worksheet"

1. A gardener uses a coordinate grid to design a new garden. The gardener uses polygon WXYZ on the grid to represent the garden. The vertices of this polygon are W(3, 3), X(−3, 3), Y(−3, −3), and Z(3, −3). Each grid unit represents one yard.Find the area of the garden.

2. Caleb is planning a new deck for his house. He graphs the deck as polygon ABCDEF on a coordinate plane in which each grid unit represents one foot. The vertices of the polygon are A(1, 0), B(3, 2), C(3, 5), D(8, 5), E(8, 2), and F(6, 0). What is the area of Caleb’s deck ?

3. The grid shows the path Tommy followed when he walked from his home at (0, 0) to various locations and back home again. If each grid square represents one block, how many blocks did he walk ?

4. Suppose the next day Tommy walks from his home to the mall at (0, 8), and then walks to a movie theater at (7, 8). After leaving the theater Tommy walks to the store at (7, 0) before returning home. How far does he walk ?

**Problem 1 : **

A gardener uses a coordinate grid to design a new garden. The gardener uses polygon WXYZ on the grid to represent the garden. The vertices of this polygon are W(3, 3), X(−3, 3), Y(−3, −3), and Z(3, −3). Each grid unit represents one yard.Find the area of the garden.

**Solution : **

**Step 1 :**

Graph the vertices, and connect them in order.

From the graph, it clear that the shape of the garden is a square.

Let us find lengths of the sides YZ and WZ.

**Step 2 : **

Find the length of the side YZ.

The ordered pair of Y is (-3, -3).

The x-coordinate of Y is -3, so point Y is |-3| = 3 yards from the y-axis.

The ordered pair of Z is (3, -3).

The x-coordinate of Z is 3, so point Z is |3| = 3 yards from the y-axis.

Find the sum of the distances :

The length of side YZ = 3 + 3 = 6 yards

**Step 3 :**

Find the length of the side WZ.

The ordered pair of W is (3, 3).

The y-coordinate of W is 3, so point W is |3| = 3 yards from the x-axis.

The ordered pair of Z is (3, -3).

The y-coordinate of Z is -3, so point Z is |3| = 3 yards from the x-axis.

Find the sum of the distances :

The length of side WZ = 3 + 3 = 6 yards.

**Step 4 :**

Find the area of the square WXYZ using the lengths of the sides YZ and WZ.

Area of the square WXYZ = side x side

Area of the square WXYZ = YZ x WZ

Area of the square WXYZ = 6 x 6

Area of the square WXYZ = 36 square yards.

**Problem 2 : **

Caleb is planning a new deck for his house. He graphs the deck as polygon ABCDEF on a coordinate plane in which each grid unit represents one foot. The vertices of the polygon are A(1, 0), B(3, 2), C(3, 5), D(8, 5), E(8, 2), and F(6, 0). What is the area of Caleb’s deck ?

**Solution : **

**Step 1 :**

Graph the vertices, and connect them in order.

Draw a horizontal dashed line segment to divide the polygon into two quadrilaterals — a rectangle and a parallelogram.

**Step 2 :**

Find the area of the rectangle using the length of segment BE as the base b and the length of segment BC as the height h.

b = |8| − |3| = 5 feet

h = |5| − |2| = 3 feet

A = bh = 5 x 3 = 15 square feet

**Step 3 :**

Find the area of the parallelogram using the length of segment AF as the base. Use the length of a segment from F(6, 0) to the point (6, 2) as the height h.

b = |6| − |1| = 5 feet

h = |2| − 0 = 2 feet

A = bh = 5 x 2 = 10 square feet

**Step 4 :**

Add the areas to find the total area of the deck.

hence, the required area is

= 15 + 10 = 25 square feet

**Problem 3 : **

The grid shows the path Tommy followed when he walked from his home at (0, 0) to various locations and back home again. If each grid square represents one block, how many blocks did he walk ?

**Solution : **

**Step 1 :**

Find each distance. Each grid unit represents one block.

Tommy’s home (0, 0) to the library (0, 4) is

|4| − 0 = 4 − 0 = 4 blocks.

The library (0, 4) to the park (5, 4) is

|5| − 0 = 5 − 0 = 5 blocks.

The park (5, 4) to Tommy’s friend’s house (5, 2) is

|4| − |2| = 4 − 2 = 2 blocks.

Tommy’s friend’s house (5, 2) to the pond (7, 2) is

|7| − |5| = 7 – 5 = 2 blocks.

The pond (7, 2) to the store (7, 0) is

|2| − 0 = 2 − 0 = 2 blocks.

The store (7, 0) to Tommy’s home (0, 0) is

|7| − 0 = 7 − 0 = 7 blocks

**Step 2 :**

Find the sum of the distances.

Tommy walked 4 + 5 + 2 + 2 + 2 + 7 = 22 blocks.

**Problem 4 : **

Suppose the next day Tommy walks from his home to the mall at (0, 8), and then walks to a movie theater at (7, 8). After leaving the theater Tommy walks to the store at (7, 0) before returning home. How far does he walk ?

**Solution : **

The above situation has been illustrated in the graph given below.

**Step 1 :**

Find each distance. Each grid unit represents one block.

Tommy’s home (0, 0) to the mall (0, 8) is

|8| − 0 = 8 − 0 = 8 blocks.

The mall (0, 8) to the theater (7, 8) is

|7| − 0 = 7 − 0 = 7 blocks.

The theater (7, 8) to the store (7, 0) is

|8| − 0 = 8 − 0 = 8 blocks.

The store (7, 0) to Tommy’s home (0, 0) is

|7| − 0 = 7 − 0 = 7 blocks

**Step 2 :**

Find the sum of the distances.

Tommy walked 8 + 7 + 8 + 7 = 30 blocks.

After having gone through the stuff given above, we hope that the students would have understood "Area and perimeter in the coordinate plane worksheet".

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