# Classifying and Measuring Angles Worksheets

How to Classify and Measure Angles? Angles are formed when two rays meet at a specific endpoint, known as the vertex. Typically, angles consist of two rays and exceed infinitely in their directions. Measuring the angles - A typical angle that we often observe in geometry is nothing, but a slice cut from a circle. The vertex of the angle, the point where both the rays meet, resemble the center point of the circle. Based on their measurements, angles can be classified as: Full rotation is the maximum 360 degrees, and we get a full circle as a result. Angles that measure one-quarter of the 360 degrees, that is 360/4= 90, are known as the right angles. These angles form a square corner at the vertex. Angles that are the exact half of the full rotation that is 360/2 = 180 are known as the straight angles. These angles look precisely like a straight line. Angles that are three-fourths of full rotation and measure 270 degrees are known as the reflex angles. These angles measure less than 360 degrees and more than 180 degrees. Classifying the angles - Angles are sorted and classified based on their sizes. Here we have briefed on the common types of angles. Angles that measures less than 90 degrees are known as the acute angles. Angles that measure exactly 90 degrees are known as the right angles. Angles that measure more than 90 degrees are known as the obtuse angles. Angles that measure exactly 180 degrees are known as the straight angles.

• ### Basic Lesson

Guides students through the classification of straight, right, acute, obtuse, and reflex angles.

• ### Intermediate Lesson

Students learn step by step how to measure an angle with a protractor. 1. Line up the center of your protractor with the axis of the angle so that the 0 line of your protractor lies along one side of the angle. 2. Read the number that coincides with the other side of the angle. (Extend the line with your pencil if necessary.)

• ### Independent Practice 1

A really great activity for allowing students to understand the concepts of classifying and measuring angles.

• ### Independent Practice 2

Students classify and measure 10 angles each. The answers can be found below.

• ### Homework Worksheet

Students are provided with 12 problems to achieve the concepts of classifying and measuring angles. An example is also provided.

• ### Skill Quiz

This tests the students ability to understand Classifying and Measuring Angles.

• ### Homework and Quiz Answer Key

Answers for the homework and quiz.

• ### Lesson and Practice Answer Key

Answers for both lessons and both practice sheets.

• ### Basic Lesson

Guides students through the classification and measurement of angles.

• ### Intermediate Lesson

Guides students through using a protractor.

• ### Independent Practice 1

A really great activity for allowing students to understand how to measure and classify angles.

• ### Independent Practice 2

Students measure and classify 20 angles. The answers can be found below.

• ### Homework Worksheet

Students are provided with 12 problems that ask students to classify & measure angles.

• ### Skill Quiz

This tests the students ability to Classify & Measure Angles.

• ### Homework and Quiz Answer Key

Answers for the homework and quiz.

• ### Lesson and Practice Answer Key

Answers for both lessons and both practice sheets.

#### Geometry one-liner:

What is the boiling point of a right triangle?
90