surface area question ?
http://bit.ly/1PwEOeK

Question

surface area question ? 
http://bit.ly/1PwEOeK

anonymous · Answer

As you can see in the figure, there are 2 right-angled triangles and 3 rectangles. I believe you can see them.

anonymous · Answer

Cannot you?

anonymous · Answer

@dan815

anonymous · Answer

The total surface area is sum of the areas of all geometric figures.
The area for triangle is base*height/2, or 8*6/2=24in^2. Since we have 2 of these, so we double this area, being 24*2=48in^2
As for the rectangle at the bottom, the formula to use is length*breadth or 8*20=160in^2.
For the other rectangles, their breadth will be the hypotenuse of the right-angled triangles, which are found by Pithagoras Theorem h=sqrt(side1^2 + side2^2) or sqrt( 8^2+6^2)=10in^2.
Since we have 2 of these rectangles, we double it. being 10*2=20in^2
Finally we sum all the areas.
What do you get?

anonymous · Answer

are you from africa? nice profile pic by the way lol

anonymous · Answer

@Hoslos

anonymous · Answer

Yes, I am. haha, How did you come up with that?

anonymous · Answer

@emily753159 ?