Obtuse Angle Study Guide
An obtuse angle is an angle that measures more than 90 degrees and less than 180 degrees. In other words, an obtuse angle is between a right angle (90 degrees) and a straight angle (180 degrees).
Characteristics of Obtuse Angles
Examples of Obtuse Angles
Some examples of obtuse angles include:
Identifying Obtuse Angles
To identify an obtuse angle, you can use a protractor to measure the angle. If the angle measures between 90 and 180 degrees, it is an obtuse angle.
Practice Problems
1. Identify the following angles as obtuse or not obtuse:
a) 75 degrees
b) 120 degrees
c) 200 degrees
Answers
a) 75 degrees - Not obtuse
b) 120 degrees - Obtuse
c) 200 degrees - Not obtuse
.◂Math Worksheets and Study Guides Sixth Grade. Plotting Points
Study Guide
Plotting Points 
Worksheet/Answer key
Plotting Points Worksheet/Answer key
Plotting Points Worksheet/Answer key
Plotting Points Worksheet/Answer key
Plotting Points Vocabulary/Answer key
Plotting Points
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
The Number System
Apply and extend previous understandings of numbers to the system of rational numbers.
Understand a rational number as a point on the number line. Extend number line diagrams and coordinate axes familiar from previous grades to represent points on the line and in the plane with negative number coordinates. [6-NS6]
Understand signs of numbers in ordered pairs as indicating locations in quadrants of the coordinate plane; recognize that when two ordered pairs differ only by signs, the locations of the points are related by reflections across one or both axes. [6-NS6b]
Find and position integers and other rational numbers on a horizontal or vertical number line diagram; find and position pairs of integers and other rational numbers on a coordinate plane. [6-NS6c]
Solve real-world and mathematical problems by graphing points in all four quadrants of the coordinate plane. Include use of coordinates and absolute value to find distances between points with the same first coordinate or the same second coordinate. [6-NS8]