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2 years ago

Find the area of a compound shape The answer is 357 m^2 I just need the steps.....

Mathematics

1 answer:

Veseljchak [2.6K]2 years ago

5 0

9514 1404 393

Answer:

figure the areas of the rectangle and semicircle
add them together

Step-by-step explanation:

The area of the rectangle is given by ...

A = LW

A = (20 m)(14 m) = 280 m²

The area of the semicircle is ...

A = (1/2)πr²

A = (1/2)π(7 m)² = 24.5π m² ≈ 77 m²

Then the total area is ...

280 m² +77 m² = 357 m²

_____

The width of the rectangle is the diameter of the circle, which is twice its radius. The area of a semicircle is 1/2 the area of a circle.

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A Triangle has an area of 36cm^2. The base and height are scaled by a factor of 5. What is the area of the resulting triangle?

Finger [1]

Answer:

Area of resulting triangle will be 900 $cm^2$ .

Step-by-step explanation:

When sides of any polygon if scaled by a factor of k

then area is scaled by $k^2$

According to the above statement

therefore here in the question since area of original triangle was 36 $cm^2$

and both base and height are scaled by a factor of 5.

therefore area of scaled triangle will be $5^2$ times of the original

that is 25 x 36 which gives 900 $cm^2$

So area of resulting triangle will be 900 $cm^2$

7 0

3 years ago

Pls help me figure this out

hodyreva [135]

Answer:

C. $\frac{27}{225}=\frac{b}{100}$

Step-by-step explanation:

To find the number of black ribbons one would have subtract the amount of red ribbons from the total number of ribbons. Then one would have to express it as a proportion. Part over whole equals percent over 100. The number of black ribbons over total ribbons equals "b" over 100.

8 0

3 years ago

can u tell me which letter the answer is.. i know how to do this problem im just confused what the answer is

Ede4ka [16]

Answer:

Im pretty sure its a :3

Step-by-step explanation:

7 0

3 years ago

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Ivenika [448]

Answer: