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kvv77 [185]
3 years ago
7

The Pyraminx is a Rubik's cube-type toy in the shape of a tetrahedron. The Pyraminx shown below has edges 15\,\text{cm}15cm long

and vertical height h=12.2\,\text{cm}h=12.2cm. The triangle drawn with dashed lines is a right triangle. What is the distance rr? Round your answer to the nearest tenth.
Mathematics
1 answer:
Alex787 [66]3 years ago
3 0

Answer:

8.7

Step-by-step explanation:

15 squared is 225 then you subtract the square of 12.2: 148.84, then after you find that out, you find the square root of 76.16 since that's what the answer of 15 squared minus 12.2 squared, and the answer is 8.7

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m_a_m_a [10]

Answer:

Answer Cone Z and Cylinder Y.

Step-by-step explanation:

The relationship between the volume of the cone and the volume of the cylinder with the same height and same base is the volume of the cone is 1/3 of the volume of the cylinder.

The formula for the volume of the cone is :

V = 1/3πr^{2}h

The formula for the volume of the cylinder is :

V = πr^{2}h

Let be the height of the cylinder Y. Therefore the height of the cone Z is 3h, when we put it into the formula we get :

V = 1/3πr^{2} (3h) = πr^{2}h

Therefore Cone Z and Cylinder Y have same volume.

8 0
3 years ago
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Mnenie [13.5K]

Answer:

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Step-by-step explanation:

Given:

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8 0
3 years ago
What’s the slope of (5,9) and (8,4)
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