Sum of Interior Angles of a Polygon Guided Notes

A Polygon is a closed figure that is made up of straight lines that don't intersect. Which of the following is not a polygon?

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Tags

CCSS.1.G.A.1

CCSS.2.G.A.1

A regular polygon is a figure whose sides are all the same length. Which of the following is not regular?

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CCSS.2.G.A.1

To find the sum of all the interior angles of any polygon, regular or not, use the formula (n-2)180, where n is the number of sides. Which are the interior angles of this polygon?

• The white colored angles

• The red colored angles

• the black colored angles

• the blue colored angles

Tags

CCSS.7.G.B.5

Use the formula (n-2)180 to find the sum of the interior angles of this polygon.

• 180 degrees

• 360 degrees

• 540 degrees

• 720 degrees

Tags

CCSS.7.G.B.5

Find the sum of the interior angles of this polygon.

• 180 degrees

• 360 degrees

• 540 degrees

• 720 degrees

Tags

CCSS.7.G.B.5

What is the SUM of the angle measures in a nonagon (9 sides)?

• 1440°
• 900°
• 1080°
• 1260°

Tags

CCSS.7.G.B.6

What is the SUM of the angle measures in a triangle (3 sides)?

• 60°
• 90°
• 120°
• 180°

Tags

CCSS.8.G.A.5

To find a missing angle of a polygon first find the sum of all the angles then subtract the angles you know. A pentagon has 540 degrees and the sum of the interior angles I know is 428 degrees to get the missing angle subtract.

• 112 degrees

• 180 degrees

• 428 degrees

• 540 degrees

Tags

CCSS.7.G.B.5

Find the value of X.

• 100
• 120
• 125
• 130

Tags

CCSS.4.MD.C.5

CCSS.4.MD.C.7

CCSS.4.OA.A.3

Find the measure of each angle indicated. 

• 139°
• 66°
• 138°
• 116°

Tags

CCSS.8.G.A.5