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matrenka [14]
3 years ago
8

At a certain time of day 1.8m tall person standing next to the Washington monument cast a 0.7m shadow at the same time the Washi

ngton monument cast a 65.8m shadow how tall is Washington monument
Please help‍♀️

Mathematics
1 answer:
mezya [45]3 years ago
8 0

Answer:

169 m

Step-by-step explanation:

See the image below.

Line AB represents the monument and line BC its shadow

Line DB represents the man and Line BE it shadow.

The Sun’s rays are parallel, so AC||DE.

Then ∆ABC ~ ∆DBE

AB:BC::DB:BE

x/65.8 = 1.8/0.7     Multiply both sides by 65.8

       x = 65.6 × 1.8/0.7  

       x = 65.6 × 2.571

       x = 169 m

The height of the Washington monument is 169 m.


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Answer:

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So if you're simplifying then you need to find the greatest common factor. The GCF is 9.

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3 years ago
A circle is drawn within a square as shown.
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<h3>Area of shaded region is 21.5 square centimeter</h3>

<em><u>Solution:</u></em>

The area of the shaded region is equal to the area of the square minus the area of the circle

<em><u> Find the area of the square</u></em>

Area\ of\ square = a^2

Where, "a" is the length of each side

From given figure in question,

a = 10 cm

Area\ of\ square = 10^2\\\\Area\ of\ square = 100\ cm^2

<em><u>Find the area of circle </u></em>

The area of the circle is given as:

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r = \frac{diameter}{2}\\\\r = \frac{10}{2}\\\\r = 5

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7 0
3 years ago
ANSWER ASAP
xz_007 [3.2K]

Answer:

12.5 pi or 39.26990

Step-by-step explanation:

First we can find the radius, which is half the diameter, 5 feet. To find the area of a semi-circle we would find the area of the circle and then divide by 2:

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We can substitute what we have:

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This gives us:

12.5 pi or 39.26990(Not sure what format you need it in)

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Answer:

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