Hello everyone! I'm sorry I couldn't go on for a few days, my Internet wasn't working properly. Finally it's working. So now I can do the posts Mr. Backe assigned us. And I can finally comment too. So anyways I am going to tell you the Most Elegant ways to find Rectangular Prisms, Triangular Prisms, the Cube, the Cylinder, and any Square Based Prism.

**The Rectangular Prism:**

**SA=2(lw)+2(hl)+2(hw)****SA=2(6)(10)+2(4)(10)+2(4)(6)**

**SA=120+80+48**

**SA=248 square units**

**The Triangular Prisms:**

First you find the area of a triangle.

**A=bh/2**

**A=(4)(4)/2**

**A=16/b**

**A=8 square units**

And then the base.

**A=bh**

**A=(4)(10)**

**A=40 square units**

And finally the roofs.

You have to find the hypotenuse by using the Pythagorean Theorem.

**a squared + b squared = c squared**

**4 squared + 4 squared = c squared**

**16 + 16 = c squared**

**32 (square rooted) = c squared (square rooted)**

**5.656 = c**

**A=2[h(Hyp.)]**

**A=2[10(5.656)]**

**A=2(56.56)**

**A=113.12 square units**

Then you add all of the answers together.

**113.12 + 40 + 8 = 161.12 square units**

I know it looks complicated but this is as elegant it's gonna get.

**The Cube:**

**SA= 6s squared**

**SA= 6(3) squared**

**SA= 6(9)**

**SA= 54 units square**

**The Cylinder:**

**SA=2 pi r squared + 2 pi r h**

**SA=2(3.14)(3)squared + 2 (3.14)(3)(8)**

**SA=2(3.14)(9) + 2(3.14)(24)**

**SA=(3.14)18+ (3.14) 48**

**SA=56.52+150.72**

**SA=207.24**

**Any Square Based Prism:**

You could use this if you have any Prism with a square. You could use it as a base. If you had a rectangular prism with a square on the sides than you use this formula.

**Thank you for reading! Please leave a comment and tell me how I did!**

## 4 comments:

Great job! Really liked your diagrams and explanations

Good job Zerlina! Nice pictures, and explanations! :D

Awesome job Zerlina! Nice colours and pictures. Your examples are very clear and understandable. Keep it up!

Great post! I like your images they were easy to see and read. I also like how you used colours (:

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