The area of the indoor sports exhibition is shown below.

what is its perimeter? m ?

what is its area? m2 ?

Step-by-step explanation:

First, you need to make these conversions:

(Remember that )

4,000 cm to m:

700 cm to m:

You can observe in the figure that it is formed by  two rectangles and a semi-circle.

To calculate the perimeter, you need to add the exterior measures of each figure.

Remember that the circumference of a circle is:

Where "r" is the radius

Therefore, the perimeter is:

To find the area of the indoor sports exhibition, you need to add the areas of the rectangles and the area of the semi-circle.

The area of a rectangle can be calculated with:

Where "l" is the lenght and "w" is the width.

The area of a semi-circle can be calculated with:

Where "r" is the radius.

Then, the area of the indoor sports exhibition  is:

c

step-by-step explanation:

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in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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