# Tetrahedron

Calculate height and volume of a regular tetrahedron whose edge has a length 19 cm.

**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

**Showing 0 comments:**

**Be the first to comment!**

#### To solve this example are needed these knowledge from mathematics:

## Next similar examples:

- Cube corners

From cube of edge 14 cm cut off all vertices so that each cutting plane intersects the edges 1 cm from the nearest vertice. How many edges will have this body? - Add vector

Given that P = (5, 8) and Q = (6, 9), find the component form and magnitude of vector PQ. - Theorem prove

We want to prove the sentense: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started? - Line

It is true that the lines that do not intersect are parallel? - Trigonometry

Is true equality? ? - Teams

How many ways can divide 16 players into two teams of 8 member? - Examination

The class is 21 students. How many ways can choose two to examination? - Elimination method

Solve system of linear equations by elimination method: 5/2x + 3/5y= 4/15 1/2x + 2/5y= 2/15 - Average

If the average(arithmetic mean) of three numbers x,y,z is 50. What is the average of there numbers (3x +10), (3y +10), (3z+10) ? - AP - simple

Determine the first nine elements of sequence if a10 = -1 and d = 4 - Sequence

Write the first 7 members of an arithmetic sequence: a_{1}=-3, d=6. - Confectionery

The village markets have 5 kinds of sweets, one weighs 31 grams. How many different ways a customer can buy 1.519 kg sweets. - PIN - codes

How many five-digit PIN - code can we create using the even numbers? - Chords

How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 tones? - Sequence 2

Write the first 5 members of an arithmetic sequence a_{11}=-14, d=-1 - Reference angle

Find the reference angle of each angle: - Sequence

Write the first 6 members of these sequence: a_{1}= 5 a_{2}= 7 a_{n+2}= a_{n+1}+2 a_{n}