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koban [17]
3 years ago
13

Can you help me with this maths question? (image attached)

Mathematics
1 answer:
mafiozo [28]3 years ago
8 0
The radius is 10.4 cm. And the angle is 120 which is 1/3 of the circle. 
Just use the area formula: 3.14 *r^2 to find the total area of 339.62 and then divide this by 3 to get 113.21. Then to subtract the triangle..find the area of the traingle which is 1/2 (10.4)^2 = 54.08. 113.21 - 54.08 = 59.13 which should be your answer
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Read 2 more answers
25 points!!! Please help with math!
Inessa05 [86]
11. 
V=pir^2h
V=pi*(5x+2)*(2x+8)
Distribute 
(pi*5x*pi*2)(2x+8)
Apply the foil method (a+b)(c+d)=ac+ad+bc+bd
10pix^2+40pix+4pix+16x
Simplify
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S=4pi(3x+2)^2
Use square of sum (a+b)^2=a^2+2ab+b^2
4pi((3x)^2+2*3x*2+2^2)
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Have a nice day :D

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