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Mathematics 21 Online
OpenStudy (rawfeeds-):

Which classification correctly describes the polygon? A. concave decagon B. concave pentagon C. convex decagon D. convex pentagon https://static.k12.com/calms_media/media/1560500_1561000/1560563/1/e29eb39029e6fa23712add96810e01fe4594a6c1/MS_IMC-1401113-109081.jpg

OpenStudy (rawfeeds-):

@Wendy.Ivette11714

OpenStudy (rawfeeds-):

@agent0smith

OpenStudy (rawfeeds-):

@Daniee_Bruhh

OpenStudy (rawfeeds-):

@Owlcoffe

OpenStudy (rawfeeds-):

@Daniee_Bruhh do you know this

OpenStudy (daniee_bruhh):

Yeah I think it's D. but I am not to sure. I know that if something is convex then it doesn't have points that go inward unlike concave that cave.

OpenStudy (rawfeeds-):

can you help me with more

OpenStudy (daniee_bruhh):

yeah sure lol

OpenStudy (rawfeeds-):

ok can i post here

OpenStudy (rawfeeds-):

@Daniee_Bruhh

OpenStudy (daniee_bruhh):

Yeah you can if you want lol

OpenStudy (rawfeeds-):

ok

OpenStudy (rawfeeds-):

The sum of the measures of the interior angles of a convex polygon is 3060º. How many sides does the polygon have? A. 18 B. 17 C. 19 D. 15

OpenStudy (rawfeeds-):

@Daniee_Bruhh

OpenStudy (daniee_bruhh):

Hmmm.. I think the answer is C.19 It seems like the only one that is right.

OpenStudy (rawfeeds-):

What is the measure of each interior angle in a regular 15-gon? A. 120° B. 167° C. 108° D. 156°

OpenStudy (daniee_bruhh):

D is the answer

OpenStudy (rawfeeds-):

The sum of the measures of the interior angles of a polygon is 720°. How many sides does the polygon have?

OpenStudy (daniee_bruhh):

It has 6 sides. (x-2)*180=720. Therefore making x=6.

OpenStudy (rawfeeds-):

What is the measure of each interior angle in a regular 20-gon?

OpenStudy (daniee_bruhh):

The answer is 162 degrees 180 x (20-2)/20 <-- the formula interior angle is 162 degrees

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