Do Now

1. GF is 20 cm long. How long is CF?2. GB is 10 cm long. How long is EG?3. AG is 15 cm long. How long is AD?

Do Now

1. What does concurrency mean?

2. By the exterior angles inequality theorem, name all of the angles less than angle 10.

CHAPTER 5

GET INTO ASSIGNED GROUPS!

Review Day

State the postulate or theorem used to prove the triangles congruent. If not possible, state not possible.

State the postulate or theorem used to prove the triangles congruent. If not possible, state not possible.

Which side is greater, AC or CD? Why?

40°

30°

A

E

D

C

B

8

8 11

10

80°

Which angle is greater, Angle DBE or Angle DEB?

40°

30°

A

E

D

C

B

8

8 11

10

80°

40°

30°

A

E

D

C

B

8

8 11

10

80°

Which side is greater, AC or AB? Why?

Find the measure of angle NJZ.

Find the range of possible values for x.

75°

(3x)°

10

8

Which angles are less than the m of angle 9?

Which angles are less than the m of angle 3?

Find the length of KH.

Find the range for the measure of the third side of a triangle given the measures of two sides.

9ft & 3ft

Find the range for the measure of the third side of a triangle given the measures of two sides.

6ft & 10ft

For questions 7 and 8, can we create a triangle with the following lengths? If we cannot, why

not?

4, 5, 8

For questions 7 and 8, can we create a triangle with the following lengths? If we cannot, why

not?

7, 3, 4

What is a median? Draw an example within a triangle.

What type of center point is D, if created with angle bisectors?

If IZ=6, what is the length of YZ.

*point Z is a

centroid

If IR=4 what is the length of RV.

*point Z is a

centroid

If ZV=12, what is the length of NV.

*point Z is a

centroid

If ZR=5, what is the length of MR.

*point Z is a

centroid

Homework

Page 382 (#11-13, 16 (find centroid)-18, 26-33) Study for Test