Thursday February 5 HOMEWORK

Assignment: p. 423 in your textbook. Find a counter-example for each of the 3 statements (if possible)

Details:  For each of these statements, you need to try and draw an example that proves it wrong.


Statement 1 - If two triangles have their corresponding angles equal, then the triangles are similar. 
** Try to draw 2 triangles with the same angles as each other, that are NOT the same shape**



Statement 2 - If two triangles are both isosceles, then the triangles are similar. 
** Try to draw 2 isosceles triangles (isosceles means 2 sides are the same length) that are NOT the same shape**



Statement 3 - If two triangles have their corresponding sides proportional, then the triangles are similar. 
**Try to draw 2 triangles with proportional (or same length) sides, that are NOT the same shape**



Hint: you will only be able to get a counter-example for Statement 2, but draw examples for the other statements too.

Due: Tomorrow (Friday) in class

February 3 HOMEWORK

Assignment: Copy this IN-OUT table, look for a pattern and fill in the missing numbers

Hint: Look at how much you are adding to each number in the OUT column.
You start with 2 then you  +2 to get 4. Then you +3 to get 7. Then what? How much do you add to 7 to get 11? Look for a pattern and keep going...

Due: Thursday February 5 in class

Monday February 2 HOMEWORK

Assignment: Draw a triangle that is similar to triangle ABC that I gave you.  Name the new triangle using any 3 letters.

Instructions: Measure the angles and side lengths of triangle ABC. Draw a new triangle that is either bigger or smaller, but similar. That means do not change any angles, and multiply or divide all the side lengths by the same number.  

If you want to make your new triangle bigger, multiply all the side lengths by the same number. If you want the new triangle to be smaller, divide all the side lengths by the same number. 

When you are done, label your new triangle. 

Due: Tomorrow (Tuesday) in class. 

Please email me or come see me if you need help.

The class notes from today are in the next post. 

Monday February 2 CLASS NOTES

Here are the notes from today's class

Friday January 30 - NO HOMEWORK

No homework, enjoy your weekend :)

Thursday Jan 29 - HOMEWORK

Assignment: p. 419 in the textbook

Hints: Draw out the original triangle (with side lengths 2, 3, and 4) then draw 3 more triangles. One will have a bottom side = 6, one will have the left side = 6 and the last triangle will have the right side = 6. For each of the 3 triangles, use ratios to figure out the lengths of the other sides.

Due: Tomorrow in class (Friday Jan 30)

**If you need help, you can email me or come in to see me before homeroom.

Thursday January 29 - CLASS NOTES

Here are the class notes from today's class. The homework will be in a separate post.