Lines & Angles
Transcript of Lines & Angles
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Lines & Angles
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Equations of Parallel & Perpendicular Lines
Parallel Lines Have the SAME (equal) slopes
Perpendicular Lines Slope is OPPOSITE RECIPROCAL
**Flip & Switch
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4.1
evaluate
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4.2
evaluate
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4.3
4.4
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4.5
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Angles & Sides of a Triangle
Interior Angle inside angle
SUM THEOREMS
Exterior Angle
Isosceles Triangles
Equilateral Triangles
Triangle Inequalities
Side Angle Relationships
**Angles "belong" to the side facing/opposite it
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7.2
7.3
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Special Segments in Triangles
Circumcenter
Point of Concurrency
Incenter
Centroid
Median A segment whose endpoints are on 1) a vertex and 2) the midpoint of the opposite side
Altitude A segment whose endpoints are on 1) a vertex and 2) perpendicular to the opposite side
Orthocenter the point of intersection/ concurrency of all three altitudes
Lines are concurrent if they intersect at the same point, called the point of concurrency (intersection)
Midsegment A segment connected the midpoints of two sides of a triangle
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8.1
8.2
8.3
8.4