Day 12
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Math 444, Monday, 10/25
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| Sponsor |
Today's class is brought to you by the Geometric
Mean. |
| Topics |
More similar triangles.
Different points of view on right triangles. Triangles with shared angle
that are not Thales figures with parallel sides. |
| Class Schedule |
- Class problems: Two similar triangle problems in a right triangle.
- Application to construction of Geometric mean of a and b = sqrt (a*b)
and inverse of a..
- Class problem: Given triangle OAB with OA = 3, OB = 7 and AB = 6.
If A' is on ray OA and B' is on ray OB, with OA' = 5/3 and OB' = 5/7,
then what is A'B'? For a general discussion of problems like this, follow
this link.
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| Assignments |
| New |
Quiz 1 on Wednesday, 10/27
Supplies: Quiz Wednesday. Bring your drawing tools and your
Construction Portfolio.
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| Due Today |
Assignment 5B
Read: These sections of Berele-Goldman contain results we
have explored in Lab and in class: 5.1 (tangents to lines), 5.3
(external tangents), 7.1 (circumcircles), 7.3 (inscribed circles).
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| Ongoing |
Assignment 5C |
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