- Apply Pythagorean Theorem to find missing side. (could be diagonal of a square or vice versa).
- Apply converse to determine if right, acute or obtuse.
- Use shortcuts to find missing sides of 30-60-90 or 45-45-90 (isosceles right). Might need to keep in radical form.
- Don't forget that equilateral triangle is just two 30-60-90
- Area of triangle or square or rectangle.
- Real world application of Pythagorean Theorem.
HW #9 - p 519: 1-3,5, 7. On the triangles in 5 and 7, you will need to use the distance formula three times (once for each side of the triangle).
Distance Formula is not on the quiz.
In some classes we used dot paper to represent the two shortcuts.
We finished up the worksheet over the shortcuts (attached below with answers) and we did some note-building and practiced area of a triangle (attached).
We also went over the homework in detail to make sure that students have a chance to understand the more difficult problems.
The application problem on the quiz in not from HW #8. Think more like the problems after #18 on p 502-3 (we did these as a warm-up).
HW #9 - p 517:1-3,5,7. On the triangles in 5 & 7, you will need to use distance formula once for each side length.
The ACTM Contest entry was passed out to interested students. $2.00 due by next Friday.
If you have placement questions, please ask me.
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warm-up_feb_5-6.pdf |