# 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.

Student 2:

Your goal is to figure out which rectangle your partner drew. You name points in the coordinate plane and your partner will tell you whether the point is on their rectangle.