Please help mmeeeeee I will give you brianly and 50 points

Mathematics

2 answers:

inna [77]3 years ago

6 0

Answer:

Do u think u can make the pic a lil bigger i can help but i cant rlly see it?

Step-by-step explanation:

Masteriza [31]3 years ago

6 0

The scale factor is 2/3 going from 21mm to 14mm so applying the scale factor to 18mm gives you a length of 12 for the missing part

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54 ÷ 6 x (12-4) + 2 =

Aleksandr-060686 [28]

Answer:

Step-by-step explanation:

1. 54÷6 =9

2. (12-4)=8

3. 9-8 = 1

4. 1+2 = 3

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Archimedes calculated the volume of a sphere by comparing it to what solid? prism cylinder pyramid box

Stella [2.4K]

<h2>Answer:</h2>

cylinder

<h2>Step-by-step explanation:</h2>

Archimedes was a brilliant mathematician. This man rose the formula of the volume of a sphere by comparing this shape to a cylinder. The volume of a sphere is hard to calculate by comparing this object to a cube. So Archimedes imagined cutting a sphere into two halves, called hemispheres. So an hemisphere gave him a flat surface, which is easier to work with. Therefore, if he'd find the volume of a hemisphere, then he'd multiply the result by 2 and would get the volume of a sphere. Then he imagined a hemisphere within a cylinder as the one shown below. Also, he imagined a cone within the same cylinder. <em>What did he find? </em>He found that the volume of the hemisphere should be equal to the volume of the cylinder minus the volume of the cone:

$V=\pi r^3-\frac{1}{3}\pi r^3 \\ \\ V=\frac{2}{3} \pi r^3$