Next time we meet, there will be a quiz (about 30 pts) over 5.1-3 (HW 13-15) and C-31-40 and 52. Be prepared for T/F (direct quotes from conjectures or simple problems about angles in a polygon) and problems where you find angles in a sketch. Can you find the number of sides in a polygon if you know the sum of the interior angles?
We warmed up with coordinates of a polygon where we found slopes of the sides and interpreted the type of quadrilateral. You also need to do p 271: 17 as a proof of the isosceles trapezoid diagonals being congruent (done as warm-up).
Students were able to check all homework and ask questions.
Then we devoted the rest of class to proving the parallelogram properties:
HW #16: p 284-6: 1-6, 14. Catch up conjectures through 44 and also #52 on p 306. #31 is on p 263, #44 is on p 283.
Study for your quiz!
We warmed up with coordinates of a polygon where we found slopes of the sides and interpreted the type of quadrilateral. You also need to do p 271: 17 as a proof of the isosceles trapezoid diagonals being congruent (done as warm-up).
Students were able to check all homework and ask questions.
Then we devoted the rest of class to proving the parallelogram properties:
- Opposite angles are congruent (#41)
- Consecutive angles are supplementary (#42)
- Opposite sides are congruent (#43)
- The diagonals of a parallelogram bisect each other (#44).
HW #16: p 284-6: 1-6, 14. Catch up conjectures through 44 and also #52 on p 306. #31 is on p 263, #44 is on p 283.
Study for your quiz!
parallelogram and trapezoid notes.pdf |