Obtuse Triangle
An obtuse triangle is a type of triangle that has one angle that is greater than 90 degrees. In other words, one of the angles in an obtuse triangle measures more than 90 degrees.
Properties of Obtuse Triangle
- An obtuse triangle has one angle that is greater than 90 degrees.
- The sum of the interior angles of an obtuse triangle is always 180 degrees.
- The other two angles in an obtuse triangle are acute angles, meaning they are less than 90 degrees.
Example of Obtuse Triangle
For example, if the angles of a triangle measure 100°, 30°, and 50°, then it is an obtuse triangle because one of the angles (100°) is greater than 90 degrees.
Study Guide
When identifying an obtuse triangle, look for the angle measurements and determine if one of the angles is greater than 90 degrees. Remember that the sum of the interior angles of a triangle is always 180 degrees.
.◂Math Worksheets and Study Guides Seventh Grade. Introduction to Functions
Study Guide
Introduction to Functions 
Activity Lesson
Functions Box Worksheet/Answer key
Introduction to Functions Worksheet/Answer key
Introduction to Functions Worksheet/Answer key
Introduction to Functions Worksheet/Answer key
Introduction to Functions Worksheet/Answer key
Slope Worksheet/Answer key
Function or not? Worksheet/Answer key
In-and-Out Box
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
Algebra (NCTM)
Understand patterns, relations, and functions.
Represent, analyze, and generalize a variety of patterns with tables, graphs, words, and, when possible, symbolic rules.
Represent and analyze mathematical situations and structures using algebraic symbols.
Explore relationships between symbolic expressions and graphs of lines, paying particular attention to the meaning of intercept and slope.