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chubhunter [2.5K]
2 years ago
15

⚠️ HELP ⚠️

Mathematics
2 answers:
Alona [7]2 years ago
8 0
<h2>A = 63 degrees</h2><h2>B = 36 degrees</h2><h3></h3><h3>Since angle <em>a</em> is supplementary to the 117 degree angle, we subtract 117 from 180.</h3><h3></h3><h3>180 - 117 = <u>63</u></h3><h3><u></u></h3><h3>We use that information to calculate angle <em>b. </em>Since all angles in a triangle add up to 180 degrees, we add 81 and 63, and then subtract that sum from 180.</h3><h3></h3><h3>81 + 63 = 144</h3><h3>180 - 144 = <u>36</u></h3><h3><u></u></h3><h3><em>Please let me know if I am wrong.</em></h3>
Cloud [144]2 years ago
7 0

a=180-117=63

b=180-81-63=36

so angle a is 63, and angle b is 36

please mark brainliest

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petra has 15 yards of fabric to make costumes for a paly. if each costume reqires 1,1/3 yards how many costumes can she make
RUDIKE [14]

She can make 11 costumes

I found this by dividing the two numbers and when dividing them i got 11,1/4 but you can't have 1/4 of a costume so it would only be 11

Hope this helps

If there are any questions leave a comment

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(09.04 MC)
Juliette [100K]

Answer:

central angle=18

arc length=2.5 π feet

area of a sector=31.25π square feet

Step-by-step explanation:

Given

wheel radius=25 feet

attached cars=20

Space between cars along the circumference of wheel= 360/20

                                                                                          =18

Finding arc length:

arc length= radius x angle(in radians)

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arc length   = 25 x 0.1π

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Area of the circle = πr^2

Area of the circle = π(25)^2

Area of the circle = 625π square feet.  

As the ratio of the central angle to the full circle angle is proportional to the area of the sector to the complete circle:

central angle/360=area of sector/area of circle

Area of sector= area of circle x 18/360

                       = 625π(1/20)

                        =31.25π !

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