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1.5 Segment & Angle Bisectors

1.5 Segment & Angle Bisectors. Always Remember!. If they are congruent, then set their measures equal to each other!. Midpoint. The point that bisects a segment. Bisects ? splits into 2 equal pieces. 12x+3 10x+5. A M B.

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1.5 Segment & Angle Bisectors

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  1. 1.5 Segment & Angle Bisectors

  2. Always Remember! • If they are congruent, then set their measures equal to each other!

  3. Midpoint • The point that bisects a segment. • Bisects? splits into 2 equal pieces 12x+3 10x+5 A M B 12x+3=10x+5 2x=2 x=1

  4. Segment Bisector • A segment, ray, line, or plane that intersects a segment at its midpoint. k A M B

  5. Midpoint Formula • Used for finding the coordinates of the midpoint of a segment in a coordinate plane. • If the endpoints are (x1,y1) & (x2,y2), then

  6. Ex: Find the midpoint of SP if S(-3,-5) & P(5,11).

  7. Ex: The midpoint of AB is M(2,4). One endpoint is A(-1,7). Find the coordinates of B.

  8. Angle Bisector • A ray that divides an angle into 2 congruent adjacent angles. BD is an angle bisector of <ABC. A D B C

  9. Ex: If FH bisects <EFG & m<EFG=120o, what is m<EFH? E H F G

  10. Last example: Solve for x. * If they are congruent, set them equal to each other, then solve! x+40o x+40=3x-20 40=2x-20 60=2x 30=x 3x-20o

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