We can always split a regular polygon with $n$ sides into $n$ triangles, whose base is the side of the polygon and whose height is the apothem of the polygon. So, the sum of the areas of all these triangles is

$A=n\times \dfrac{s\cdot a}{2}$

where $n$ is the number of sides, $s$ is the side length, and $a$ is the apothem length.

So, you just need to plug you values in: in your case, you have $n=7,\ s=6,\ a=8$

So, the formula becomes

$A=7\times \dfrac{6\cdot 8}{2} = 7 \times 6\cdot 4 = 168$

3 0

3 years ago

Which BEST describes a horizontal stretch?

Margaret [11]

In a simple Cartesian plane, there are two axes, y-axis that is drawn vertically and the x-axis that is drawn horizontally. this problem asks for the an example of horizontal stretch. Thus, the example of horizontal stretch is the stretching of the graph away from the x-axis. Thus, the answer is letter C.

8 0

3 years ago

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