by DaleCallahan | Sep 5, 2014 | Geometry
Question from Lisa We were working on Lesson 2-2 today and had difficulty understanding the Euler diagram in #29. As I understand it, the diagram is saying “If it is frozen carbon dioxide, then it is dry ice.” What I don’t understand is how you go from...
by DaleCallahan | May 17, 2014 | General High School Questions
Question from Melissa: I am trying to decide which course to do first? My son is finishing 8th grade this year and has completed Alg 1. As a freshman, he would need either Geometry or Alg2/Trig. Is there a preferred sequence? Would the sequence matter for the SAT...
by DaleCallahan | Sep 3, 2013 | Geometry
Questions: Help with Geometry ch.3.1 #36. We don’t understand how to get the last step in the answer. How does the 4 get under the “pie” and not also under the d square? Thanks Answer from Dr. Callahan: Take these steps A = pi*r^2 and r=...
by DaleCallahan | May 23, 2013 | Geometry
Question from Daniel, Would you explain problem 12 from lesson 14.5? How exactly do you calculate circular inches? Answer First, a circular inch is the amount of area taken up by a circle one inch in diameter. So that makes one circular inch = Area = pi*(d/2)^2...
by DaleCallahan | May 20, 2013 | Geometry
Questions from Teresa, I’m in Jacobs Geometry, Chapter 14, Lesson 2. The answer to problem 16 is 9 sin 20 degrees. How do you get that answer? Answer: First, from #15 you see we count 9 sides. So, n=9. For #16, based on the formula from Theorem 75 on page...
