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lana [24]
3 years ago
6

The radius of a solid hemisphere is 2r. Find its total surface area

Mathematics
1 answer:
Musya8 [376]3 years ago
5 0

Answer:

Radius= 2r

Step-by-step explanation:

Surface area of hemisphere

=2 x 22/7 x (2r)^2

=44/7 x 4 r^2

=174/7 r^2

=25.14 r^2

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Answer:

x = 37

Joe Mama said to use to pythagorus theorem. Then u can sing super idol

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If the length of a rectangle is 12 ft. and its area is 84 sq. ft., find the width of the rectangle.
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If the point x,sqrt(3)/2 is on the unit circle. What is x?
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Image a coordinate plane with points plotted at ordered pairs Q(-4,4) R(2,4) S(5,-3) T(2,-3) and U (-4,-3) what is the area of t
pogonyaev

In counterclockwise order that's


R(2,4), Q(-4,4), U(-4,3), T(2,-3), S(5,-3)


That's a trapezoid, height 7 upper base 6, lower base 9, so average base 15/2 and area 7(15)/2 = 105/2 = 52.5.


Answer: 52.5


The shoelace theorem gives the answer without thinking. We write the list on top of itself shifted and add up the cross produces:


R(2,4), Q(-4,4), U(-4,-3), T(2,-3), S(5,-3)

Q(-4,4), U(-4,-3), T(2,-3), S(5,-3), R(2,4),


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