Pleaseeeeeee help meeeee

Mathematics

2 answers:

Vera_Pavlovna [14]3 years ago

6 0

Answer:

Step-by-step explanation:

Add all the numbers up then divide by the amount of numbers (10)

Kay [80]3 years ago

4 0

Answer:

C. 82

Step-by-step explanation:

Mean is the average of the number set

So,

82 + 91 + 89 + 78 + 81 + 88 + 75 + 85 + 77 + 74 =

820

820 / 10 =

82

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The perimeter of an equilateral triangle is 12\/3 cm. Find the radius, apothem and area of the equilateral triangle.

Irina-Kira [14]

Answer:

Radius - 4

Apothem - 2

Area - $12\sqrt{3}$ or 20.8

Step-by-step explanation:

Try to draw out my explanation so you know what this looks like.

~~~~

This is an equilateral triangle, so all sides are the same length. The perimeter can be divided by 3 to get each side length...

$12\sqrt{3} \div3 = 4\sqrt{3}$

Now that we know the side lengths, we can get this started!

~~~~

Now, an equilateral triangle has angles that all equal 60 degrees. We can bisect this into TWO special case triangles of measures 90-60-30.

4 times the square root of 3 will be the hypotenuse, and the smallest leg is always half of that. The larger leg is represented as the small leg times the square root of 3.

$Small=2\sqrt{3} \\Hypotenuse = 4\sqrt{3} \\Long =6$