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Anastasy [175]
3 years ago
15

Find the surface area of the regular tetrahedron. Round to the nearest hundredth.

Mathematics
2 answers:
PIT_PIT [208]3 years ago
4 0
A= Root 3 a squared 
Using this formula 
your answer is 62.35
tatyana61 [14]3 years ago
4 0
4 triangles, all the same:

each side is an equilateral triangle:

A = 1/2*6*h, h = sqrt( 6^2 - 3^2) = 3*sqrt(3), A = 9*sqrt(3)

Total = 36*sqrt(3) = 62.35382907247957

Nearest hundredth: 62.35


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In the rhombus m<1 =160. What are m<2 and m<3? The diagram isn't drawn to scale
Zolol [24]
A rhombus is a parallelogram with four equal sides and two sets of equal angles.

If the m<1=160°, then the angle opposite (3) would also be 160°.

m<3=160°.

Becuase it is a parallelogram, the sum of the measurment of two angles that share a line would be 180 (supplementary).

m<2 and m<4 is 20°.
5 0
3 years ago
A rectangle has a length that is 10 less than 3 times the width. If the rectangle has an area of 8 square feet, what is the widt
JulijaS [17]

Solve this problem by forming an equation

3x - 10 = 8

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The width of the rectangle is 6 square feet.

3 0
4 years ago
Marisol has 5 times as many books as jerry. Jerry has 15 books. How many more books does marisol have
ICE Princess25 [194]

Answer:

5 times more books

Step-by-step explanation:

In total Marisol has 75 books.  She has 5 times as many books and Jerry has 15.  5*15=75

6 0
2 years ago
A&amp;b are complimentary angles a measures 32 what is the measure of b
tensa zangetsu [6.8K]

Answer:

B=58

Step-by-step explanation:

Complementary angles are angles where the sum equals 90°. So all you have to do is 90-32 and you get 58.

8 0
3 years ago
Test the claim that the proportion of men who own cats is smaller than 70% at the 0.05 significance level. The null and alternat
Ghella [55]

Answer:

the null hypothesis would be: p = 70%/0.7

The alternative hypothesis would be: p < 0.7

Step-by-step explanation:

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In this case study the null hypothesis would be: the proportion of men who own cats is 70%: p = 0.7

The alternative hypothesis would be: the proportion of men who own cats is smaller than 70% : p < 0.7

3 0
3 years ago
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