chapter 10.1 parallelogram and trapazoid
formula for trapazoid: A=a+b/2*h a is the top and b is the bottom h is the height
chapter 10.2 area of a circle
pie= 3.14 time radius squared
10.3 three dimensional figure
a prism is a polyhedron. it has two congruent bases that lie in parallel planes. the other faces are rectangle.
a pryramid is a polyhedron. pyramids have one base. the other face are triangles.
a cylinder is a solid with to circle as bases.
10.4 surface areas of prism and cylinders
prismformula : 2B + Ph
b = 1/2 time the heigh times the base
s=2B + Ch=2pier + 2pierh
10.5 surface areas of pyramids and cones
S=3.14*r squared + 3.14*r*l
10.6 volume of prisms and cylinders
10.7 volume of pyrimids and cones
volume of a cone : 1/3Bh=1/3*3.14*r h
10.8 volume of a sphere
1 3volume :V=4/3*3.14*r cubed
stuff to remember
volume is always cubed