Use a ruler and a protractor to draw a segment 5 cm long and a 50 degree angle . Then use the ruler and a protractor to draw a bisector of the segment.

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Presentation transcript:

Use a ruler and a protractor to draw a segment 5 cm long and a 50 degree angle . Then use the ruler and a protractor to draw a bisector of the segment and the angle. Bell work

SLO Students will learn to use a compass and a straight edge to construct congruent angles and congruent segments.

Vocabulary Construction- uses a straightedge and a compass to make geometric figures. Straightedge- a ruler with no markings on it. Compass- geometric tool used to draw circles and parts of circles called arcs. Perpendicular Bisector Theorem- If a point is on the perpendicular bisector of a segment, then it is equidistant from the endpoints of the segment. Converse of Perpendicular Bisector Theorem- If a point is equidistant from the endpoints of a segment, then it is on the perpendicular bisector of the segment. Distance from a point to a line- length of the perpendicular segment from the point to the line. Angle Bisector Theorem- If the point is on the bisector of an angle, then it is equidistant from the sides of the angle. Converse of Angle Bisector Theorem-If a point is in the interior of an angle is equidistant from the sides of the angle , then it is on the angle bisector.

Create Congruent Segments http://www.youtube.com/watch?v=ajip3AeSR wY

Construct Congruent Angles http://www.youtube.com/watch?v=jj1woMA6 CbE

Construct Perpendicular Bisectors http://www.youtube.com/watch?v=5bvjnleM n5A

Homework 1 Construct a set of congruent segments. 2. Construct congruent angles. 3. Construct a Perpendicular Bisector 4. Construct an Angle Bisector. 5. Give an example of when each of these might be used in real life. (10 points) Homework Rubric 1. Segments with labels and arcs 2 points 2 of the above 1 point 2. Angles with labels and arcs 2 points 3. Perpendicular Bisectors with labels and arcs 2 points 4. Angle Bisectors with labels and arcs 2 points .25 points for each appropriate example for 1-4.