Today's class summary 08/12

1- Today's class started over theorem 6-13 that said:

if: it is a rhombus

then: each diagonal bisects a pair of opposite angles

2- After that we went over the homework (p.317 #4 and 21-47), which was kind of easy for the people that actually did it, with no provings ;D. The question that most people had doubts was #33, because we had to use the quadratic formula(you can see it in Jenni's post). Also, for numbers 34-37, you could solve it using only the idea of slopes without the distance formulas.

Obs. Mrs. Saatkamp won't accept any graphing on quizzes and tests, only algebra.

3- After the homework, we started the lesson 6-5 that is about trapezoids:

Trapezoid's definition: It's a quadrilateral with exactly one pair of opposite sides parallel.

There are two types of trapezoids: Right Trapezoid and Isosceles Trapezoid

Right Trapezoid: It has exactly two right angles

Isosceles: Its legs are congruent


4- After looking over the trapezoids, we went over 3 theorems: theorem 6-14, theorem 6-15 and theorem 6-16.

theorem 6-14: If it is an isosceles trapezoid, then both pairs of bs angles are congruent

theorem 6-15: If it is an isosceles trapezoid, then the diagonals are congruent. Obs. the diagonals don't bisect each other

theorem 6-16: If it is a trapezoid, then the median is the sum of both bases divided by two.

Homework is only due on thursday because tomorrow we are going to work on the projects and on wednesday we are going to present for the little kids. Hw: p.325 #16-37 except for 36.

PS. 33-35 requires algebra