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bija089 [108]
3 years ago
14

A regular decagon has a side length of 4 centimeters long if the decagon is divided into 10 congruent triangles each has an appr

oximate height of 6.2 centimeters what is the approximate area of the decagon
Mathematics
1 answer:
ratelena [41]3 years ago
4 0
Area of decagon is given by:
Area=1/2(nsr)
where:
n=number of sides
s=side length
r=height
thus the area will be given by:
Area=1/2(10*4*6.2)
Area=124 cm^2
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Answer:

Step-by-step explanation:

Step One

Find the exterior angle connected to the 93 degree angle. It is also a supplement to 93. Supplementary angles add to 180. Call the exterior angle y

93 + y = 180          Subtract 93 from both sides

y = 180 - 93

y = 87

Step two

Add all the exterior angles. They equal 360

x + 52 + 87 + x + 3 + 78 = 360    Combine the like terms

Step 3

Solve the equation

2x + 220 = 360                            Subtract 220 from both sides

2x  = 360 - 220

2x = 140                                        Divide by 2

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I don't see that anywhere, but I'm pretty sure I'm right.

4 0
2 years ago
How do u work this problem out
charle [14.2K]
Okay what problem is it that you need help with??
4 0
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What is the essential question?
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3 years ago
Asap 13 points and show work
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3 years ago
Solve for x in the equation x^2-10x+25=35
yKpoI14uk [10]
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3 years ago
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