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Questions and Answers
What is the figure formed by two rays sharing a common endpoint called?
What is the figure formed by two rays sharing a common endpoint called?
- Plane
- Curve
- Line
- Angle (correct)
What are angles formed by the intersection of two planes called?
What are angles formed by the intersection of two planes called?
- Supplementary angles
- Vertical angles
- Dihedral angles (correct)
- Complementary angles
What is the magnitude of an angle called?
What is the magnitude of an angle called?
- Geometric angle
- Arc length
- Radius
- Angular measure (correct)
Where does the word 'angle' originate from?
Where does the word 'angle' originate from?
How does Euclid define a plane angle?
How does Euclid define a plane angle?
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Study Notes
Geometry Fundamentals
- Two rays sharing a common endpoint form an angle.
- Angles created by the intersection of two planes are known as dihedral angles.
Angle Measurements
- The magnitude of an angle is referred to as its measure or size.
Etymology
- The word 'angle' originates from the Latin term 'angulus,' meaning "corner" or "a small bend."
Euclid's Definition
- Euclid defines a plane angle as the figure formed by two rays extending from a common endpoint, emphasizing the relationship between the rays in a flat, two-dimensional space.
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