# Section A: Practice Problems The Coordinate Plane

## Section Summary

Details

In this section, we plotted and described points on the coordinate grid.

The point is 4 units from the vertical axis and 2 units from the horizontal axis. Its coordinates are . The point is 0 units from the vertical axis since it is on the vertical axis. It is 7 units from the horizontal axis. Its coordinates are .

The first coordinate of a point tells us its horizontal position and the second coordinate gives its vertical position.

## Problem 1 (Pre-Unit)

1. Which shapes are rectangles?

2. Which shapes are rhombuses?

3. Which shapes are squares?

## Problem 2 (Pre-Unit)

1. Name two lines in the drawing that are parallel.

2. Name two lines in the drawing that are perpendicular.

## Problem 3 (Pre-Unit)

1. Draw a rectangle on the grid.

2. What is the perimeter of the rectangle?

## Problem 4 (Pre-Unit)

Which of the triangles are right triangles?

## Problem 5 (Lesson 1)

1. How would you describe the point labeled ?

2. How would you describe the rectangle R?

## Problem 6 (Lesson 2)

• What are the coordinates of the point on the grid?

• Locate and label point  with coordinates , point with coordinates , and point with coordinates .

## Problem 7 (Lesson 3)

• Fill in the blanks with 4 different numbers between 0 and 10 and plot the points on the graph.

•

•

• What do you notice about the points?

• Locate the points , , , and on the graph.

• What do you notice about the points?

## Problem 8 (Exploration)

1. One of the Open Up Resources Math characters describes their first initial like this: “Start at and go to , then go to , then to , and to .” Which character is it?

2. Describe, using coordinates, how to trace a letter from your name.

## Problem 9 (Exploration)

Work with a partner.

Student 1:

Draw a rectangle on the coordinate plane. Make sure the area of your rectangle is at least 20 square units. Don’t show your partner your rectangle.