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KengaRu [80]
1 year ago
9

What is 3/10 of 1/2 metre and why?

Mathematics
1 answer:
jek_recluse [69]1 year ago
6 0

Answer:

15 cm     or .15 m

Step-by-step explanation:

1 meter is 100 cm

1/2 m = 50 cm

  3/10 of this =   3/10 * 50 = 15 cm      or  .15 m

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xenn [34]

Answer:

perimeter is  4 sqrt(29) + 4pi  cm

area is 40 + 8pi cm^2

Step-by-step explanation:

We have a semicircle and a triangle

First the semicircle with diameter 8

A = 1/2 pi r^2 for a semicircle

r = d/2 = 8/2 =4

A = 1/2 pi ( 4)^2

  =1/2 pi *16

  = 8pi

Now the triangle with base 8 and height 10

A = 1/2 bh

  =1/2 8*10

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Add the areas together

A = 40 + 8pi cm^2

Now the perimeter

We have 1/2 of the circumference

1/2 C =1/2 pi *d

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        = 4pi

Now we need to find the length of the hypotenuse of the right triangles

using the pythagorean theorem

a^2+b^2 = c^2

The base is 4 ( 1/2 of the diameter) and the height is 10

4^2 + 10 ^2 = c^2

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116 = c^2

sqrt(116) = c

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Each hypotenuse is the same so we have

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2 sqrt(29) + 2 sqrt(29) + 4 pi

4 sqrt(29) + 4pi  cm

3 0
3 years ago
Read 2 more answers
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