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Questions and Answers
What is a right angle?
What is a right angle?
- An angle less than 90 degrees
- An angle greater than 90 degrees
- An angle that is exactly 90 degrees (correct)
- An angle that is exactly 180 degrees
What defines an obtuse angle?
What defines an obtuse angle?
- An angle greater than 90 degrees and less than 180 degrees (correct)
- An angle less than 90 degrees
- An angle exactly 90 degrees
- An angle exactly 180 degrees
What is a straight angle?
What is a straight angle?
- An angle less than 90 degrees
- An angle greater than 90 degrees
- An angle that measures exactly 180 degrees (correct)
- An angle that measures exactly 360 degrees
What is a vertex?
What is a vertex?
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What defines an acute angle?
What defines an acute angle?
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What is an isosceles triangle?
What is an isosceles triangle?
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What is an equilateral triangle?
What is an equilateral triangle?
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What is an obtuse triangle?
What is an obtuse triangle?
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What is an acute triangle?
What is an acute triangle?
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What is a right triangle?
What is a right triangle?
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What is a reflex angle?
What is a reflex angle?
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Study Notes
Types of Angles
- Right Angle: Measures exactly 90 degrees.
- Obtuse Angle: Measures greater than 90 degrees but less than 180 degrees.
- Straight Angle: Measures exactly 180 degrees.
- Acute Angle: Measures greater than 0 degrees but less than 90 degrees.
- Reflex Angle: Measures greater than 180 degrees but less than 360 degrees.
Key Geometric Terms
- Vertex: The point where two or more rays or lines meet; also referred to as a corner.
Types of Triangles Based on Angles
- Isosceles Triangle: Has two sides of equal length and two equal angles.
- Equilateral Triangle: All three sides and angles are equal.
- Obtuse Triangle: Contains one obtuse angle (greater than 90 degrees).
- Acute Triangle: All angles measure less than 90 degrees.
- Right Triangle: Contains one right angle (exactly 90 degrees).
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Description
Review the fundamental concepts of angles with these flashcards. Each card provides a key term along with its definition, helping you understand right, obtuse, straight, and acute angles, as well as vertices. Great for quick study and reinforcement of basic geometry concepts.
