Saturday, April 22, 2017

Monday, April 17, 2017

Find the length of Segment AB - Coordinate Geometry

Mathberry Lane Problem of the Week


I love problems that can be solved different ways.  The problem below can be solved using the distance formula, Pythagorean's Theorem or even special right triangles.

Mathberry Lane: Find the length of a segment - Coordinate Geometry

Sunday, April 2, 2017

Equilateral Triangle Bisected to Make Special Right Triangles 30-60-90

Mathberry Lane Problem of the Week

How would you go about solving this problem?  I provided a sample answer using special right triangles.



Sunday, March 26, 2017

Similar Triangles and Congruent Triangles

Mathberry Lane Problem of the Week

This week's problem is for geometry.  Start by discussing the difference between similarity and congruence.  Will your students use traditional congruent criteria or a sequence of rigid motion transformations to justify their response?  And, will they use traditional similar triangle criteria or similarity transformations? This is an open ended problem with lots of possible solutions.


Sunday, March 19, 2017

Decomposing Fractions using Area Model Problem

Problem of the week

One of my favorite things about math is that there are often many ways to arrive at a solution.  Below, I have posed a problem that has many ways to arrive at a solution.  I have shown 3 sample solutions: decomposing fractions using an area model, algebraic, and tape diagrams.  How would you solve this one?