6th Grade Math Textbook, Progress

Classify each angle as right, acute, obtuse, orstraight.

Use a protractor to check.

3. 
   
   
   
   4. 
      
      
      
      5. 
         
         
         
         6. 
            
         
         
         
         
      
      
      
      
   
   
   
   

Write Trueor False. If false, explain why. Use the figure at the right.

7. AM

MB
8. MC⊥MD

9. 
   AMC
   
   CMB 10. Mis the midpoint of CE.


10. MDbisects
    CMB. 12. m
    AME
    90°

Draw a figure for each description.

13. BQ is the bisector of
PBS. 14. AY
bisects BX
at P.

15. ABis the perpendicular bisector of XY
. 16. MN⊥QR














Line sis a segment

bisector of AB
.

Line tis a perpendicular

bisector of CD
.

Angles that are equal in measure are

called congruent angles.

An angle bisector is the ray that divides

a given angle into two congruent angles.

FZ is the angle bisector of 
EFG.


EFZ

ZFG

AB

s

M

CD

t

N

F

G

Z

E

A M B

C D

E

is congruent to

Bisectors

The midpoint of a segment is the point that divides the segment into

two congruent segments. Segments that are equal in length are called

congruent segments.

Point Mis the midpoint ofPQ
.

PM

QM

A segment bisector is any line, ray, or segment that intersects a segment

at its midpoint. If a segment bisector is also perpendicular to the segment,

it is called the perpendicular bisector of the segment.

PQ

M

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