Oo709238
Answered

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(49 points)
Find the surface area to the nearest tenth. (Only round on the last step)

49 Points Find The Surface Area To The Nearest Tenth Only Round On The Last Step class=

Sagot :

mlarsen5000

Answer:

885.18

Step-by-step explanation:

Base = 18x18=324

triangles = 1/2(18)height

To find the height, you could divide it in half and use the 30-60-90 rule or Pythagorean theorem.

9²+b²=18²

81+b²=324

b²=324-81

b²=243

b=√243

b=15.58

So each triangle is 1/2(18)(15.58845)=140.2961.

Four of them would be 561.1845.

Now add the base.

561.1845+324=885.1844

kande0407

Answer:

885.2

Step-by-step explanation:

The other answer is almost correct they just rounded wrong.

I just did the test.

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