Chapter 9: Problem 23
Classify each angle as acute, obtuse, right, or straight. $$110^{\circ}$$
Short Answer
Expert verified
The angle \(110^{ ext{°}}\) is an obtuse angle.
Step by step solution
01
Understand the Types of Angles
To classify angles, let's first understand the categories:- **Acute Angle:** An angle less than \(90^{ ext{°}}\).- **Right Angle:** An angle exactly \(90^{ ext{°}}\).- **Obtuse Angle:** An angle greater than \(90^{ ext{°}}\) but less than \(180^{ ext{°}}\).- **Straight Angle:** An angle exactly \(180^{ ext{°}}\).
02
Identify the Given Angle
In this exercise, the given angle is \(110^{ ext{°}}\). We need to determine which category this angle falls into based on its measure.
03
Compare the Angle to Definitions
To classify \(110^{ ext{°}}\), compare it with the angle definitions:- \(110^{ ext{°}}\) is greater than \(90^{ ext{°}}\) but less than \(180^{ ext{°}}\).- Therefore, \(110^{ ext{°}}\) is an obtuse angle because it meets the criteria for being greater than \(90^{ ext{°}}\) but less than \(180^{ ext{°}}\).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Acute Angle
An acute angle is a charming type of angle defined by its measure of being less than 90 degrees. While it may be small, it plays a significant role in various geometric contexts. Think of it as the angle of choice when something needs to be sharp or concise without being overly steep or flat.
- An acute angle is always less than a right angle.
- Examples include angles like 30°, 45°, and 60°.
Obtuse Angle
An obtuse angle is broader and more expansive, being larger than a right angle. It measures greater than 90 degrees but less than 180 degrees. This gives obtuse angles a more open appearance, often suggesting a relaxed and wide-opening.
- Obtuse angles are always greater than acute angles.
- Examples include angles like 110°, 120°, and 150°.
Right Angle
The right angle is iconic with its exact measure of 90 degrees. It is the hallmark of perpendicular intersections, forming perfectly square corners. When anything is at a right angle, it signifies uprightness and stability.
- Right angles are found in many everyday objects like books, doors, and windows.
- It is a cornerstone in geometry, often used as a reference to ensure accuracy in constructions.
Straight Angle
A straight angle stands apart with its measure of exactly 180 degrees. It is the angle that creates a line, representing a perfect and unchanging direction. Think of a straight angle as the seamless flow from one point to another along a flat line.
- Straight angles divide a plane into two equal halves.
- They are the result of aligning two rays in opposite directions.