Angles Between Lines Warm Up:

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Presentation transcript:

Angles Between Lines Warm Up: By the end of the day you should be able to… Find the angle of inclination of a line Find the angle between two lines TS: Explicitly assessing information & drawing conclusions Warm Up: What was the formula for tan(x – y) again? (You have notes & I have books so you should be able to find it somewhere if it’s not still engrained in the brain.)

Angle of Inclination y x

Example: Find the angle of inclination for the line 2x – y + 3 = 0 Find the equation of the line with a y-intercept of 3 and an angle of inclination of 3π/4

Angle Between Two Lines y x

Example: Find the acute angle formed by the lines 2x + 3y = 4 and x – 4y + 3 = 0

Finding the angles of the triangle (2, 3) (4, 3) (-1, -5)