3 years ago

Whats happenin playas'

Mathematics

2 answers:

Doss [256]3 years ago

6 0

Answer:

nothing, I just want free points!

thx

iogann1982 [59]3 years ago

4 0

Bless you , i needed free points these ads take to long

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2 years ago

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An 8-sided die is formed when two square pyramids are attached by their bases. The perimeter of the base shape is 6 centimeters.

lawyer [7]

Answer:

7.5cm²

Complete question:What is the surface area of the 8-sided figure?

Step-by-step explanation:

Consider the half of the 8-sided die i.e the pyramid ABCDE:

As the base is 6 of the perimeter, so each side of the base is 6/4=3/2

Now, the distance between the tallest points is 2 cm, so the height of Pyramid ABCDE is 1 cm.

Considering the right triangle EOM:

EO=1, OM= 3/4 (it is half of AB=3/2) and EM is the hypothenuse, so by the pythagorean theorem length of EM is

$\sqrt{1+ ( \frac{3}{4} )^{2} }= \sqrt{1+ \frac{9}{16} }= \sqrt{ \frac{25}{16} }= \frac{5}{4} (cm)$

5. So side EBC has area

$\frac{1}{2}BC*EM= \frac{1}{2}* \frac{3}{2}* \frac{5}{4}= \frac{15}{16}$

6. The total area is 8*Area(EBC)= $8* \frac{15}{16}= \frac{15}{2}=7.5 ( cm^{2} )$

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2 years ago

How do you find the are of the diameter

GalinKa [24]

I think you mean circumference, which is equal to = 2πr

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2 years ago

Kevin buys 4 folding chairs. Each chair costs $13.50. The sales tax is 6.5%. What is the amount of sales tax for Kevin's purchas

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2 years ago