Find the area of a decagon with side of 4cm.

Find the area of a pentagon with side length of 10cm

Find the area of a hexagon with radius of 5in.

Just took this quick check 100% right

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To find the area of a decagon with a side length of 4cm, you can use the formula for the area of a regular polygon:

Area = (s^2 * n) / (4 * tan(pi/n))

In this formula, s is the side length of the decagon and n is the number of sides (which is 10 for a decagon). Plugging in the given values, we have:

Area = (4^2 * 10) / (4 * tan(pi/10))

Calculating this expression yields the area of the decagon.

Now, to find the area of a pentagon with a side length of 10cm, you can use a different formula:

Area = (s^2 * n) / (4 * tan(pi/n))

Using the same formulas as before but with different values, we have:

Area = (10^2 * 5) / (4 * tan(pi/5))

Calculating this expression will give you the area of the pentagon.

Lastly, to find the area of a hexagon with a radius of 5in, you can use a different formula:

Area = (3 * sqrt(3) * r^2) / 2

In this formula, r is the radius of the hexagon. Plugging in the given value, we have:

Area = (3 * sqrt(3) * 5^2) / 2

Calculating this expression will give you the area of the hexagon.

An octagon with the perimeter of

117mm