2 years ago

Edmund made a scale drawing of the rectangular floor of his kitchen. In the scale

Mathematics

1 answer:

Bezzdna [24]2 years ago

5 0

2.5*6.4=16, 2.5*4.8=12. 12+12+16+16=56

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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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3 years ago

How to convert from rectangular to polar coordinates pre calc?

Verizon [17]

Given the polar coordinate (r,θ), write. x=rcos θ and. y=rsin θ.Evaluate cos θ and. sin θ.Multiply cos θ by. r. to find the x-coordinate of the rectangular form.Multiply sin θ by. r. to find the y-coordinate of the rectangular form.

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3 years ago

Type a digit that makes this statement true. 48,49 ,867 is divisible by 9. Submit

horrorfan [7]

Answer: 8

Step-by-step explanation:

48,498,867 divided by 9 = 5,388,763

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2 years ago

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labwork [276]

Answer:

Can you add a picture or visual model if there is one?

Step-by-step explanation:

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2 years ago

Dina is arranging 45 wedges of cheese on 7 plates. Each plate has the same number of wedges.

slamgirl [31]

C. 3.

7 × 6 = 42.

45 - 42 = 3.

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3 years ago

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