Sunday, February 20, 2011

Properties of Quadrilaterals - 4:36

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Properties of Angles formed by a Transversal - 6:17

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Properties of Interior Exterior Angles in Triangles and Quadrilaterals - 7:49

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Altitude of a Triangle Properties - 7:50

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Median of a Triangle Properties - 6:42

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Friday, January 30, 2009

Coordinate Geometry - 6:46

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Trig Ratios SOH CAH TOA - 20:58

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KEY CONCEPTS:

ONLY for RIGHT ANGLED TRIANGLES

SOH-CAH-TOA

SOH - sinA=opp/hyp
CAH - cosA=adj/hyp
TOA - tanA=opp/adj

Longest side of right angled triangles is called the HYPOTENUSE. Always found on the opposite side of the right angle of the triangle.

To find the angle use the inverse of the trig buttons on your calculator.

Angle Relationships - 20:58

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KEY CONCEPTS:

Complementary Angles = 90
Supplementary Angles = 180
Opposite Angles = one another

Parallel Lines with a Transverse through it:
Corresponding Angles = one another (F-Shape)
Co-Interior Angles add up to 180