# Measuring angles - Degrees and Protractors | Summary and Q&A

202.4K views
August 18, 2016
by
tecmath
Measuring angles - Degrees and Protractors

## TL;DR

This video explains how to measure angles using a protractor and introduces different types of angles, including right angles, acute angles, obtuse angles, and reflex angles.

## Key Insights

• 🫥 An angle is formed when two lines meet at a vertex.
• 🗂️ Angles are measured using a protractor, which is divided into 360 degrees.
• 🗯️ A right angle measures 90 degrees and is found in shapes like squares and rectangles.
• 🔺 Acute angles are less than 90 degrees, while obtuse angles are between 90 and 180 degrees.
• 🔺 There are also reflex angles which measure between 180 and 360 degrees.
• 🔺 It is important to align the vertex and baseline correctly when measuring angles using a protractor.
• 🅰️ Understanding angle types and measurements is useful in geometry and other math-related subjects.

## Transcript

good day welcome to techmath channel what we're going to be having a look at in this video is how to measure angles and not only that we're going to have a look at a few other things actually we're going to look at first off just the ways that we measure angles then we're going to have a look at some different types of angles in their measurements ... Read More

### Q: How do you measure angles using a protractor?

To measure an angle, align the vertex of the angle with the center point of the protractor and the baseline with the zero marking. Read the degree measurement where the other arm intersects the protractor.

### Q: What is a right angle and why is it important?

A right angle measures exactly 90 degrees and is formed when two lines are perpendicular to each other. Right angles are important because they are found in shapes like squares and rectangles.

### Q: What are acute angles and how are they measured?

Acute angles measure less than 90 degrees and are formed when two lines meet at a point. To measure an acute angle, use a protractor and align the baseline with zero, then read the degree measurement where the other arm intersects the protractor.

### Q: What are obtuse angles and how are they measured?

Obtuse angles measure between 90 and 180 degrees. To measure an obtuse angle, use a protractor and align the baseline with zero, then read the degree measurement where the other arm intersects the protractor.

## Summary & Key Takeaways

• The video begins with an overview of what an angle is, including the vertex and arms.

• It explains that angles are measured using a protractor, which is divided into 360 degrees.

• The video introduces common angles such as the right angle (90 degrees) and the straight angle (180 degrees), as well as acute angles (less than 90 degrees) and obtuse angles (between 90 and 180 degrees).