Angle

High school (ages 12+)
Mathematics & Numbers

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/angle

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the angular measurement units?Degrees (°), Radians (rad)
2. What is the historical influence?Babylonian sexagesimal system likely influenced the 360° division of a circle
3. How do we measure angles?Angles are usually measured in degrees, where a full circle is 360°, or in radians, where a full circle is 2π radians. A protractor is a common tool that shows degrees.
4. What are the different kinds of angles?Angles can be acute (less than 90°), right (exactly 90°), obtuse (between 90° and 180°), straight (180°), or reflex (more than 180° but less than 360°).

Radian: A unit of angular measure defined as the angle subtended at the center of a circle by an arc equal in length to the radius.
Trigonometry: The branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions.
Vector: A quantity having direction as well as magnitude, often represented by an arrow.