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Grade 8 geometry

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  • what is a line passing though the midpoint and perpendicular to the segment
    perpendicular bisector
  • what is the point of intersection of 3 perpendicular biesctors
    center of gravity
  • look at the board and prove CA=CB (CD perpendicular to [AB]
    equidistant
  • how can we prove 2 lines are parallel
    2 properties of lines
  • let ABC be an isosceles triangle at A. M midpoint of [BC]. what does [AM] represent for triangle ABC
    Median, height, bisector and perpendicular bisector
  • Define a right triangle
    having one right angle
  • on the board place 2 point A and o. Mark B symmetric of A with respect to o
    O mid point
  • define a right isoscles triangle
    2 equal sides 45 45 90
  • define an isosceles triangle
    a triangle having 2 equal sides, 2 equal angles
  • what is a height?
    perpendciular
  • Define an equilateral triangle
    Triangle having 3 equal sides 3 equal angles
  • two angles having one common vertex and are equal
    VOA
  • what is the point of intersection of 3 heights
    orthocenter
  • Define a semi- equilateral triangle
    30,60,90
  • In a right triangle right at C what does [AB] represent for ABC
    Hypotenuse
  • AOB= BOC= AOC divided by 2. what can you say about [OB)?
    bisector
  • name the elements of a circle
    radius, diameter, center, chord, arc
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