Work out the surface area of a cube of edge 3m

Mathematics

2 answers:

Alona [7]4 years ago

7 0

Umm, surface area of a cube = 6e^2 (six edge square) which is 6(3)sqaure = 54

ELEN [110]4 years ago

3 0

If the edge is 3 you multiply it by 3 which gets you 9 you then multiply this by 6 since the cube has 6 sides

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Find the perimeter of triangle ABC.

Harlamova29_29 [7]

By definition, the perimeter of the triangle is the sum of its sides.
We must then use the formula of distance between points:
$d = \sqrt{(x2-x1) ^ 2 + (y2-y1) ^ 2}$
We now look for the longitus for each of the sides:

For L1:
$L1 = \sqrt{(6-2)^2 + (6-2)^2}$
$L1 = \sqrt{32} 
$
$L1 = 4\sqrt{2}$

For L2:
$L2 = \sqrt{(7-2)^2 + (-3-2)^2}$
$L2 = \sqrt{50}$
$L2 = 5\sqrt{2}$

For L3:
$L3 = \sqrt{(7-6)^2 + (-3-6)^2}$
$L3 = \sqrt{82}$

Then, the perimeter is given by:
P = L1 + L2 + L3
Substituting values we have:
$P = 4\sqrt{2} + 5\sqrt{2} + \sqrt{82} 

P = 9\sqrt{2} + \sqrt{82}$

Answer:
the perimeter of triangle ABC is:
none of the above.

5 0

4 years ago

Read 2 more answers

Write two prime numbers whose difference is 10?

bagirrra123 [75]

23-13=10

Prime numbers : A whole number greater than 1 that can not be made by multiplying other whole numbers Prime numbers between 1 to 100 : 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, and 97 So, The two numbers whose difference is 10 are 13 and 23 23-13=10

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3 years ago

If y = 9.99 inches, what is the perimeter of the rhombus shown above

Finger [1]

Answer:

39.96‬ inches

Step-by-step explanation:

A rhombus is any parallelogram with equal sides, including a square.

so 9.99*4=39.96‬ inches

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