SECTION 1.4 Exploring Geometry by using Paper Folding

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Presentation transcript:

SECTION 1.4 Exploring Geometry by using Paper Folding Unit 1

PERPENDICULAR LINES PARALLEL LINES 2 lines that intersect to form a right angle 2 coplanar lines that do not intersect

CONJECTURE A statement that you think is true. An “EDUCATED GUESS” based on observations.

A conjecture about perpendicular and parallel lines If 2 coplanar lines are perpendicular to the same line, then _____________

Measuring the distance from a point to a line Why do you think the distance from a point to a line is defined along a perpendicular segment??

PAPER FOLDING ACTIVITY #2

SEGMENT & ANGLE BISECTORS

REMEMBER… A segment is: ENDPOINTS ON BOTH ENDS

SEGMENT BISECTOR A line that divides a segment into 2 congruent parts

MIDPOINT The point where a bisector intersects a segment.

PERPENDICULAR BISECTOR A bisector that is perpendicular to a segment.

EXAMPLES

EXAMPLES

EXAMPLES

ANGLE BISECTOR A line or ray that divides an angle into 2 congruent angles.

EXAMPLES

EXAMPLES

EXAMPLES

PAPER FOLDING ACTIVITY #3