Math Problem Statement
直线经过原点和点 (0,一4),则的倾斜角是();直线l经过原点和点(一1,0),则2的倾斜角是()
Solution
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Math Problem Analysis
Mathematical Concepts
Analytic Geometry
Angles
Inclination of Lines
Formulas
Inclination angle θ is the angle between the line and the positive x-axis
For vertical lines, θ = 90°
For horizontal lines extending in the negative x-direction, θ = 180°
Theorems
Definition of Inclination of a Line
Suitable Grade Level
Grades 9-11
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