Tues, Feb. 10, 2014 Mathematical practice -- reason Triangles Classification review: RightEquilateralIsoscelesScalene 90 degree all sides equal 2 sides.

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Presentation transcript:

Tues, Feb. 10, 2014 Mathematical practice -- reason Triangles Classification review: RightEquilateralIsoscelesScalene 90 degree all sides equal 2 sides equal no sides equal angle

Triangle Inequality The sum of the two smallest sides must be larger than the longest side

Triangle Angle Measures The sum of all angles in a triangle add to 180 degrees EVERY TIME

Tues, Sept. 9, 2014 Mathematical practice -- reason Scale Factor For length Multiply by scale factor (scale factor is 3)

Scale Factor For area Multiply by scale factor squared (3 squared is 9) 6 2 Area is Area is 108

Tues, Sept. 9, 2014 Mathematical practice -- reason Circle Relationships Perimeter Diameter Radius

Circle Relationships Perimeter Diameter Radius Perimeter Diameter Radius x 2 = π = Diameter Perimeter = 2πr Radius = ½ Diameter

Angle Pairs SupplementaryTwo angles add to 180° complementaryTwo angles add to 90°

Angle Pairs adjacent Common side and common vertex (not overlapping) vertical the angles opposite each other when two lines cross