Geometry; 6/4

We spent a little more time today working on similar objects and scale factors.  We set up several different types of ratio problems together in which the students had to find the scale factor first.  We worked through these together before getting started on the chapter 12 review sheet.

Assignment:  Chapter 12 review sheet


Review Sheet Answers:

1.   B = 276.3;  LA = 650;  TA = 1202.6;  Vol. = 2763
2.  B = 7.0;  LA = 37.2;  TA = 51.2;  Vol. 21.7
3.  slant height = 15.2;  B = 113.0;  LA = 286.4;  TA 399.4;  Vol. 527.5
4.  slant height = 17;  B = 256;  LA = 544;  TA = 800;  Vol. 1280
5.  B = 7.5;  LA = 288;  TA = 303;  Vol. = 135
6.  B = 1808.6;  LA = 3165.1;  TA = 6782.4;  Vol. = 37981.4
7.  slant height = 25
8.  height = 6
9.  height = 6
10.  TA of hemisphere = 108 pi  (done together in class)

Back Page:  Similar Solids

1.  a. 144 pi      b.  288 pi
2.  a.  9 pi         b.  4.5 pi
3.  3
4.  32 pi / 3   
7.  yes
8.  a.  1:3     b.  1:9      c.  1:3         d.  1:27