Monday was a B-day. Warm up was to find the volume of a composite figure involving a cone and a hemisphere. Went over hw, then looked back at spheres and deconstructed the formula to find the radius needed to meet a specific volume, and also found the surface area of a sphere. Also reviewed density in the context of a graduated cylinder by finding the volume of displaced water rather than of the object itself. Also looked at density through the lens of population density rather than mass and volume, and finally through pixel density on a smartphone.
Notes from board
Homework
do the practice assessment (blank copy) (SOLUTIONS)
real assessment is Weds (B) or Thurs (A)
Be sure you know these formulas: http://bit.ly/formulas18
Resources
Explaining formulas:
GMD-A1a
circumference: meaning of pi circumference showing 2π radii
area of a circle: rearranged slices rearranged slices, another vid
triangle method gif triangle method vid
cone surface area: link
cylinder surface area: link
GMD-A1b
cylinder volume: starts at 2:25
cone volume: link
prism volume: link
GMD-A2a
Volume of composite figure, cylinder and hemisphere: link
more composite volume: link
composite figure surface area: link1 link2
MG-A1a:
cone cylinder word problems: link link2 link3
MG-A2a:
density of an object using displaced volume: link
composite volume and density to find mass: link
using population and area and density of countries: link