Elegant Algebraic equations.
I didn't know what Mr. Backe was talking about when he said Elegant Algebraic Equations. And thats what they are, the most elegant way to find the surface area of a shape. So im going to tell you the different formulas for different shapes.
S.A of a Cube 6s²
Say the cubes side lenght is 7
S.A 6s²
S.A = 6(7²)
S.A = 6(49)
S.A= 294 u²
A rectangular Prism
S.A 2(lw)+ 2(hw) + 2(hl)
S.A 2 (4)(6) + 2 (5)(6) + 2(5)(4)
S.A 2 (24)+ 2(30)+ 2(20)
S.A 48+ 60+40
S.A 148u²
S.A 2pi r² + 2 pi rh
S.A 2 (3.14)(5²) + 2(3.14)(5)(20)
S.A 2(3.14)(25)+ 2(3.14)(100)
S.A 2 (78.539) + 2 (314.159)
S.A 157.078 + 628.318
S.A 785.396 u²
Triangular Prism
2 Triangles bh ( don't put divided by 2 because bh/2 is for one triangle I am finding for 2)
2 triangles (15)(10)
base of prism lw
base of prism (15)(20)
base of prism 300u²
2 roofs lw
first we need the side of the roof.
a² + b² = c²
10²+ 15²=c²
100+ 225 = c²
(sqroot)325= (sqroot)c²
18.027 = c
2 roofs lw
2 roofs (20) (18.027)
2 roofs 360.555 u²
Add everything together.
150u² + 300u² + 360.555 u²=
810.555u²
3 comments:
Great post! I really liked your use of colors and pictures. You explained things very well. :)
Good job Shaneille! Nice colours and explanations. Although, you should add more pictures. And don't forget the "units" after each measurement. But overall, great post!
Good job Shaneille ! I like your colours and how your pictures are clear to see. Keep up with the great posts!
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