- Angles, Lines, and Polygons
- Home
- Measuring an angle with the protractor
- Acute, obtuse, and right angles
- Naming segments, rays, and lines
- Identifying parallel and perpendicular lines
- Acute, obtuse, and right triangles
- Classifying scalene, isosceles, and equilateral triangles by side lengths or angles
- Finding an angle measure of a triangle given two angles
- Naming polygons
- Drawing and identifying a polygon in the coordinate plane

- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
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In this lesson we are given the coordinates of points in a coordinate plane.

Joining these points with line segments we get a polygonal figure. We are required to identify the polygon so formed.

Plot the following points (-5, 3) (3,3) (-5,-3) in the coordinate plane. Join the points with line segments and identify the polygonal figure so formed.

**Step 1:**

We know that in a coordinate plane, a positive number tells us to move right or up and a negative number tells us to move left or down.

**Step 2:**

To locate (-5, 3) (3,3) (-5,-3) points

Point (-5, 3): The x coordinate is -5 so we move left 5 units on x axis from origin and since y coordinate 3 is positive, we move up 3 units to locate point (-5, 3):

Similarly, the other two points (3,3) (-5,-3) are located.

**Step 3:**

Joining the three points with line segments, we see that we get a triangle as shown below.

Identify the polygon formed by the points in the coordinate plane below

**Step 1:**

There are five points in the given coordinate plane.

**Step 2:**

Joining these points with line segments, the polygon formed has five sides and is a Pentagon.

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