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