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3 years ago

In the figure below, triangle ABC is similar to triangle PQR, as shown below.

Mathematics

2 answers:

Mamont248 [21]3 years ago

6 0

Answer: 36

Step-by-step explanation:

As you can see, side AB is similar with side PQ.

Also, side BC is similar with side QR.

If you divide the length of side QR (34.5) by the length of side BC (11.5)

you get 3.

3 is the ratio that you will use to find the other side. The ratio of triangle ABC to PQR is 1:3

Multiply the side of AB (12) by 3 and you will get 36.

Molodets [167]3 years ago

4 0

Answer:

Step-by-step explanation:

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adell [148]

Answer: A=351.68 cm²

Step-by-step explanation:

To find the area of the shaded region, we would subtract the area of the circle by the area of the inner circle.

Area of Circle

$A=\pi r^2$

$A=\pi (11)^2$

$A=121\pi$

Area of inner (white) circle

$A=\pi r^2$

$A=\pi (3)^2$

$A=9\pi$

Now that we have the area to the circle and inner circle, we would subtract to find the area of the shaded region.

$A=121\pi -9\pi$

$A=112\pi$

$A=351.68 cm^2$

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