Math 9a, 2020-21

Homeworks

These homeworks are copyrighted material, posted here for use by SchoolNova students and parents. Everyone else is welcome to print a copy of these materials for their personal use; any redistribution or commercial use is prohibited

• Assigned on 09/20: Classwork: Math 9 Algebra baseline test  |  Classwork: Math 9 Geometry baseline test  |  Welcome Letter: Math 9 welcome letter to students and parents  |  
  Homework assignment for Sep. 27 is to work on the remaining problems from the baseline review test and previous year's placement tests.
  
• Assigned on 09/27: Classwork: Algebra. Elements of mathematical logic.  |  Classwork: Geometry. Commensurate segments.  |  Homework: Assignment for Oct. 4.  |  
  
• Assigned on 10/4: Algebra Classwork.: Elements of mathematical logic.  |  Geometry Classwork.: Thales proportionality theorem. Similarity  |  Homework: Homework assignment for Oct. 11  |  
  I pasted solutions of 3a and 3b from the last homework on the jamboard - you may do the rest. Please try to figure out a convenient way for you to use a jamboard, or any similar virtual board for working in class. For the new Algebra assignment on logic - please look through the handout. Do not pay attention to Math Induction - it will be our next topic.
  
• Assigned on 10/18: Algebra Classwork: Mathematical Induction. Sequences. Progressions.  |  Geometry Classwork: Direct and Inverse theorems. Ceva theorem.  |  Homework: Assignment for October 25  |  
  You can skip the mathematical induction, sequences and progressions for now (Algebra problems 3-5) - we will do it next time. In geometry - please go over the proof of the generalized Pythagorean theorem (in geometry classwork handout - or just prove it yourself using the property of proportions that we considered in class!).
  
• Assigned on 10/25: Classwork: Geometry. Similarity and homothety.  |  Homework: Homework assignment for Nov. 1.  |  
  
• Assigned on 11/1: Classwork: Math Induction. Arithmetic and geometric mean.  |  Homework: Homework assignment for Nov. 8  |  
  In geometry assignment - please solve the problems using similarity and Thales theorem where appropriate; we will solve use these using Center of Mass later.
  
• Assigned on 11/8: Algebra Classwork: Math Induction (contd). Eucleadean algorithm (rec)  |  Geometry Classwork: Geometry. Law of Lever. Method of mass points.  |  Homework: Assignment for Nov. 15  |  
  Since we did not cover the Geometry in class, you do not need to do the Geometry part of the homework.
  
• Assigned on 11/15: Classwork: Geometry. Law of Lever. Method of Center of Mass.  |  Classwork: Recap: Eucledean algorithm. Continued fractions.  |  Homework: Assignment for Nov. 15.  |  
  
• Assigned on 11/22: Classwork: Algebra. Elements of set theory.  |  Classwork: Geometry. Inscribed angles and quadrilaterals.  |  Homework: Assignment for Dec. 6  |  
  
• Assigned on 12/6: Classwork: Set theory. Algebra of sets.  |  Homework: Assignment for Dec. 13.  |  
  
• Assigned on 12/13: Classwork: Algebra of sets. Cartesian product.  |  Classwork: Geometry. Euclid's theorems. Euler's line.  |  Homework: Assignment for Dec. 20  |  
  
• Assigned on 12/20: Classwork: Sets. Functions. Injection, Surjection, Bijection.  |  Classwork: Geometry. The 9 points circle and Euler line.  |  Homework: Assignment for January 10, 2021  |  
  We are 1 lesson behind in Algebra - please skip the Algebra part of today's homework and work on the last Algebra assignment that was nominally due today, Dec. 20.
  
• Assigned on 01/10: Algebra Classwork: Set theory. Equivalence relations and classes.  |  Homework: Assignment for January 17.  |  
  
• Assigned on 01/17: Classwork: Geometry. Method of coordinates.  |  Homework: Assignment for January 24  |  
  
• Assigned on 01/24: Classwork: Algebra. Comparing infinite sets. Cardinality.  |  Homework: Assignment for January 31  |