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4 years ago

Find the number of vertices of a polyhedron that has 12 faces and 30 edges

Mathematics

1 answer:

Anna71 [15]4 years ago

5 0

Answer:

Step-by-step explanation:

Euler's formula for polyhedra states that

F + V - E = 2

where F is faces, V is vertices and E is edges

Here F = 12, E = 30, thus

12 + V - 30 = 2, that is

V - 18 = 2 ( add 18 to both sides )

V = 20 ← number of vertices

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Someone also help me with this one

Gre4nikov [31]

I think it is because the down it is 8 m

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so it should be

8-6=2

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4 years ago

A cupcake recipe calls for 1/6 cups of milk, and you have

valentinak56 [21]

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2 years ago

5x-3y-z<br> If x= -2, y=2 and z= -3

Mademuasel [1]

This is fairly simple
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3 years ago

What is the value of x for the point with a y-value of 6?

ehidna [41]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Help me please I’m struggling to much

forsale [732]

Answer:

$\frac{16}{5}$ or $3.2$

Step-by-step explanation:

The given triangles are similar, meaning that their corresponding sides are proportional.

The length of DC (I think its D) is 15 and the length of WZ is 3. ZY is in the same place as CE (16). Make a proportional relationship where Δ→Δ:

$\frac{large}{small} =\frac{large}{small}$

$\frac{DC}{WZ}=\frac{CE}{ZY}$

Insert the known values:

$\frac{15}{3}=\frac{16}{x}$

x is the value of ZY. Solve by cross multiplying:

$15(x)=3(16)\\\\15x=48$

Divide both sides by 15:

$\frac{15x}{15} =\frac{48}{15} \\\\x=3.2$

ZY is 3.2.

:Done

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3 years ago