Polygons and Triangles

Triangles and Polygons Review

Units 4 and 6

Instructional Videos

These are videos to help you remember how to solve these problems. However, you also have your notes to use as well. After the videos will be a series of questions. You may pass the videos if you don't need them. I would advise that you at least look them over.

Triangles

Let's look back at what we learned

Multiple Choice

Is a figure with sides 4, 9, and 5 a triangle?

• Yes

• No

Multiple Select

A triangle has sides 15 and 8. Check all the possible ranges of the third side?

• 9

• 7

• 15

• 23

• 21

Multiple Select

A triangle has sides 3 and 9. Check all the possible ranges of the third side?

• 10

• 7

• 5

• 13

• 11

Multiple Choice

Order the angles from smallest to largest.

• $$\angle J,\ \angle K,\ \angle L$$  
  

• $$\angle L,\ \angle K,\ \angle J$$  
  

• $$\angle K,\ \angle L,\ \angle J$$  

• $$\angle J,\ \angle L,\ \angle K$$  

Multiple Choice

A triangle has sides 22 and 5. What is the range of the third side?

• $$27<x<17$$

• $$5<x<22$$

• $$17<x<27$$

• $$22<x<5$$

Multiple Choice

Order angles from largest to smallest.

• $$\angle L,\ \angle M,\ \angle K$$

• $$\angle M,\ \angle L,\ \angle K$$

• $$\angle K,\ \angle L,\ \angle M$$

• $$\angle K,\ \angle M,\ \angle L$$

Multiple Select

A triangle has sides 19 and 10. Check all the possible ranges of the third side?

• 9

• 10

• 15

• 20

• 29

Multiple Choice

Order the sides from largest to smallest.

• FE, GF, EG

• EG, GF, FE

• GF, EG, FE

• EG, FE, GF

Multiple Choice

Order the sides from smallest to largest.

• MN, LN, LM

• LN, LM, MN

• LM, LN, MN

• LM, MN, LN

Poll

How do you feel you did in this section?

• Great! Ready to move on!

• Not quite there yet, but I will be.

• Not a clue! I need to go over all this again with my teacher.

Polygons

Let's look back at what we learned

Multiple Choice

Find the measure of an interior angle of a regular hexagon?

• 120

• 108

• 135

• 144

Multiple Choice

Find the measure of an interior angle of a regular 16-gon?

• 157.5

• 158.8

• 156

• 154.3

Multiple Choice

Find the measure of an exterior angle of a regular 21-gon?

• 18.9

• 17.1

• 21.2

• 15.7

Multiple Choice

Find the measure of an exterior angle of a regular heptagon?

• 72

• 60

• 51.4

• 32.7

Poll

How do you feel you did in this section?

• Great! Ready to move on!

• Not quite there yet, but I will be.

• Not a clue! I need to go over all this again with my teacher.