OML Search

Using a Circular Protractor

Related Topics:
Lesson Plans and Worksheets for Grade 4
Lesson Plans and Worksheets for all Grades
More Lessons for Grade 4
Common Core For Grade 4



Examples, solutions, and videos to help Grade 4 students learn how to use a circular protractor to understand a 1-degree angle as 1/360 of a turn. Explore benchmark angles using the protractor.

Common Core Standards: 4.MD.5, 4.MD.6

New York State Common Core Math Grade 4, Module 4, Lesson 5

Download worksheets for Grade 4, Module 4, Lesson 5

The following diagram shows a worksheet to learn how to measure angles using a circular protractor. Scroll down the page for more examples of using the circular protractor.

Circular Protractor

NYS Math Module 4 Grade 4 Lesson 5 Application Problem

How many right angles can fit into a circle?

NYS Math Module 4 Grade 4 Lesson 5 Concept Development

Problem 1: Reason about the number of turns necessary to make a full turn with different fractions of a full turn.

Problem 2: Use a circular protractor to determine that a quarter-turn or a right angle measures 90 degrees, a half turn measures 180 degrees, a three quarter-turn measures 270 degrees, and a full rotation measures 360 degrees.

Problem 3: Measure and draw benchmark angles with the protractor.



Lesson 5 Concept Development

We have a special name for 1/360 of a whole turn. It is called a degree. There are 360 degrees are in one whole turn?
A protractor is a tool that has been partitioned and marked off to show 360 degrees. NYS Math Module 4 Grade 4 Lesson 5 Problem Set

Find the measures of the following angles using your circular protractor. NYS Math Module 4 Grade 4 Lesson 5 Homework

1. Identify the measures of the following angles.
1. Identify the measures of the following angles.

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


OML Search


We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.


[?] Subscribe To This Site

XML RSS
follow us in feedly
Add to My Yahoo!
Add to My MSN
Subscribe with Bloglines