October 5, 2009 Math Scribe

Monday, October 5, 2009

Today in math class we learned about surface area and planes of symmetry.

We Learned that a rectangular prism has 3 planes of symmetry and that a cube has 5 plane of symmetry. We also learned that a plane of symmetry is like a line of symmety that cuts a 3D shape in half.

Another thing we learned about was surface area. Surface area is the sum of the areas of all the faces. We learned that the formula for the surface area of a rectangular prism is SA=2(lh)+2(lw)+2(wh) and the formula for the surface area of a cube SA=6s(squared).

For homework we had to find the surface area of the cube we made in class.