constructions. supplies paper (thick stack) compass straight edge
TRANSCRIPT
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Constructions
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Supplies
Paper (thick stack)CompassStraight Edge
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Congruent Line SegmentDraw a straight lineOpen compass where the point is on A and the pencil is on BPlace point on new end pointMake small arc on line
A
B
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A
B
Draw point on arcResult: Congruent Line Segment
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Segment Bisector (_|_)Select compass size > ½ the line segmentPlace Point on A make large arcPlace Point on B make large arcLook for arc intersections
AB
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Connect “X”s with Straight edgeResult: Perpendicular Bisector
A
B
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Angle BisectorSet compassPlace point on vertexMake arc intersecting both sidesSet compass from intersection to intersectionMake small arc in the interior from each intersection
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Draw a straight line from vertex through “X”Result: Angle bisector
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Congruent Angles
Draw a lineMake arc on original angle (point on vertex)Make arc on new line
Point on end pointWith compass measure arc length from side to side
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Draw line from new vertex through “X”Result: Congruent angles
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How would you …
Double a line segment?Increase line segment by Half?
Make a 45 angle?A number line?Add two line segments together?Add two angles together?