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3 years ago

9

The majority of countries in the top 10 poorest countries (based on the number of people living below the poverty level) are (5

points)
North American

South American

South Asian

African

1 answer:

chubhunter [2.5K]3 years ago

3 0

I believe the answer is Africa,

since the top poorest contries in the world are in africa.

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9. Given similar triangles ABC and PQR with AB = 4 and PQ = 7.

PilotLPTM [1.2K]

Given:

Similar triangles ABC and PQR with AB = 4 and PQ = 7.

To find:

The scale factor, ratio of perimeters, and ratio of areas.

Solution:

In similar figures the scale factor is the ratio of side or image and corresponding side of original figure.

In similar triangles ABC and PQR, the scale factor is

$k=\dfrac{PQ}{AB}$

$k=\dfrac{7}{4}$

The scale factor of triangle ABC to triangle PQR is $\dfrac{7}{4}$ .

The ratio of the perimeters of similar triangles is equal to the ratio of their corresponding sides.

$\dfrac{\text{Perimeter of }\Delta ABC}{\text{Perimeter of }\Delta PQR}=\dfrac{AB}{PQ}$

$\dfrac{\text{Perimeter of }\Delta ABC}{\text{Perimeter of }\Delta PQR}=\dfrac{4}{7}$

$\dfrac{\text{Perimeter of }\Delta ABC}{\text{Perimeter of }\Delta PQR}=4:7$

The ratio of the perimeters is 4:7.

The ratio of the areas of similar triangles is equal to the ratio of squares of their corresponding sides.

$\dfrac{\text{Area of }\Delta ABC}{\text{Area of }\Delta PQR}=\dfrac{AB^2}{PQ^2}$

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$\dfrac{\text{Area of }\Delta ABC}{\text{Area of }\Delta PQR}=16:49$

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3 years ago

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