3 years ago

3. Who set up their equation correctly for the following question?

Mathematics

1 answer:

melisa1 [442]3 years ago

5 0

Heyy 3747484884 hwibdhdjens

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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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Quadrilateral RSTU has one pair of opposite parallel sides and one pair of opposite congruent sides as shown.

mylen [45]

<span>It cannot be determined from the information given The answer is A

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Why is no one helping or answering ANY of my questions asked so far? :( I thought it said questions are normally answered with-i

vodka [1.7K]

Questions are USUALLY answered within 10 minutes.

Therefore, you're questions might be complicated, hard, or incomplete.

Actual people are answering these questions, so obviously the easier questions get answered first.

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What would 9c-6+c be as an equivalent expression

pshichka [43]

-6+10c
I think, reorder the terms: -6+9c+c= -6+10c

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