Question

Could you please please help me?

@dtan5457

Answer 1

Well, I can help you with the first one. You already have the height, 15, now you just need to find the length of that rectangle.

Since its, an isosceles triangle as it says its the midpoint of 2 equal edges, (same length, and a 90 degree angle, is isosceles.)

To find the hypotenuses of a isosceles triangle you just multiply the leg by the square root of 2. The leg is 3 as it's half the length of the 6. 3 times the square root of 2 is about 4.24264068712.

Now multiply that by 15, and it's very close to 64 cm^2.

That's your answer, 64 cm^2.

Answer 2

As for the 2nd one, I'm running really late, but I'll give you a hint. First, find the surface area of the rectangular prism, then do the same for the triangular one. Add them together. Good luck, I procrastinated long enough, gotta do my own hw, sorry.

Answer 3

Thank you hun! :)

Answer 4

Thank you sooooo much ! :DD

Answer 5

No problem, the 2nd one is much easier, you can tackle that easy..Go give it a try.

Answer 6

I got 208 for the SA of the rectangular prism.

Answer 7

I got the final answer, no worries. Thank you @dtan5457 !!

Answer 8

Lol it's funny cause I was just doing it and was like WTF when I didn't get the answer. Apparently you can't really just "find" the surface areas of the two. You have to find the area of each side except for the bottom of the rectangular prism. It's 264, right?

Answer 9

Yes, however this one says "assume there's not any material underneath" , therefore it becomes 216.

Answer 10

Lol I just did it again and see what I did wrong. You are right. Apparently, I forgot how to add. It's almost 2 in the morning. I'm gonna catch some sleep before I do any stupid mistakes like that, lol.

Later ;)

Answer 11

216 is the final answer, it's correct- I checked.
~I'm dying of sleep, goodnight . :)

Answer 12

Haha.. I just read your comment and we both wrote that we're dying of sleep ! LOL

Answer 13

Lol you deserve a metal for that. May we both have a decent rest for the troubles of tomorrow...(school)..

Night!