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telo118 [61]
3 years ago
13

PLEASE HELP PLEASE HELP

Mathematics
2 answers:
Nataly_w [17]3 years ago
5 0

Answer:

D

Step-by-step explanation:

Sum the three angle of triangle = 180

x + 53 + 60 = 180

x + 113 = 180

x = 180 - 113

x = 67

Ray Of Light [21]3 years ago
3 0

Answer:

D

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Subtract the sum of the given angles from 180 for x

x = 180° - (53 + 60)° = 180° - 113° = 67° → D

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The interior angle of a regular polvgon is 9 times the size of its exterior angle
Thepotemich [5.8K]
<h3>Answer:   20 sides</h3>

==================================================

Work Shown:

x = exterior angle

9x = interior angle

interior + exterior = 180

9x+x = 180

10x = 180

x = 180/10

x = 18

n = number of sides

n = 360/x

n = 360/18

n = 20

There are <u>20</u> sides to the regular polygon.

Side notes:

  • The formula to determine n only works for regular polygons.
  • A polygon with 20 sides is known as an icosagon.
  • Any pair of adjacent interior and exterior angles are supplementary. They add to 180 degrees.
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2 years ago
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attashe74 [19]
Use Pythagorean Theorem
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Shkiper50 [21]
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3 years ago
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stellarik [79]

Answer:

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Step-by-step explanation:

7 0
3 years ago
Would the answer be 36?
umka2103 [35]

Answer:

No, it would be 72

Step-by-step explanation:

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