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kicyunya [14]
3 years ago
15

A regular polygon has an exterior angle of 7.5 what is the sum of the interior angle

Mathematics
1 answer:
AVprozaik [17]3 years ago
8 0

Answer:

540

Step-by-step explanation:

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AB and DE are chords that intersect at point F inside circle C as shown. If the measure of arc EA= 50 degrees and the measure of
defon

Answer:

Part 1) m\angle AFE=55^o

Part 2) m\angle EFB=125^o

Step-by-step explanation:

Part 1) what is the measure of angle AFE

we know that

The measure of the interior angle is the semisum of the arches that comprise it and its opposite.

<u>Note:</u> In this problem the correct measure of arc EA is 40 degrees (see the picture)

so

m\angle AFE=\frac{1}{2}(arc\ EA+arc\ DB)

substitute the given values

m\angle AFE=\frac{1}{2}(40^o+70^o)=55^o

Part 2) what is the measure of angle  EFB?

we know that

m\angle AFE+m\angle EFB=180^o ---> by supplementary angles (form a linear pair)

so

substitute the given value

55^o+m\angle EFB=180^o

m\angle EFB=180^o-55^o=125^o

8 0
3 years ago
Evaluate the expression. Will choose brainliest
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Answer:

-213

Step-by-step explanation:

3|3-5|^2-(-15)^2

3(4)-225

=12-225= -213

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3 years ago
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What number must you add to complete the square <br> x^2-20x=17
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(*)\ (a-b)^2=a^2-2ab+b^2



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Answer: 10² = 100

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