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

Fill in the Blanks

True or False.

The figure 12, 10, and 23 is a triangle.

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

Fill in the Blanks

What is the sum of the interior angles of a 13-gon?

Multiple Choice

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

• 120

• 108

• 135

• 144

Fill in the Blanks

What is the sum of the interior angles of a 25-gon?

Multiple Choice

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

• 157.5

• 158.8

• 156

• 154.3

Fill in the Blanks

If the exterior angle of a regular polygon measures 15 degrees, how many sides does it have?

Multiple Choice

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

• 18.9

• 17.1

• 21.2

• 15.7

Fill in the Blanks

If the exterior angle of a regular polygon measures 9 degrees, how many sides does it have?

Fill in the Blanks

A quadrilateral has angles 98, 84, and 72. What is the measure of the 4th angle?

Multiple Choice

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

• 72

• 60

• 51.4

• 32.7

Fill in the Blanks

A pentagon has angles x + 7, 2x - 1, x + 10, and 72. What is x?

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.