Tag Archives: similar triangles

Monday October 3, 2016

Learning Goal:
We are learning to apply proportional reasoning and problem solving to similar triangles

Warm-up:

Estimation 180

Decide what guess is too high, which is too low, then make a estimate and explain how you know! Discuss.

Look over the feedback from the quiz on Thursday. It looks like we need to review a few concepts. I am not able to be here today, but these tutorial videos will recap the ideas from similar triangles:

Watch and take notes!

Note that this tutorial does cross multiplication a bit differently, but our method will work! Here is part 2

Remember that if the question doesn’t say the triangles are similar, you have to prove it… usually with angles!

Now, make corrections to your quizzes using your notes. Check your answers when you think you have it (see the teacher for the answer key)

If you finish, begin the review handout.

*You will have a test on Wednesday that covers both unit conversions and similar triangles.

 

Thursday September 29, 2016

Learning Goal:
We are learning to apply proportional reasoning and problem solving to similar triangles

Warm up: Which One Doesn’t Belong?

*For each set of 4 pictures, find a reason why each one doesn’t belong… For example, last week we looked at this set:

wodb-numbers

We decided that 9 doesn’t belong because it only has one digit (it is also the only one whose digits don’t add to 7), 16 doesn’t belong because it is an even number, 43 doesn’t belong because it is not divisible (i.e. a prime number), and 25 doesn’t belong because all the others have a digit that is divisible by 3.

Now, try a shape example here.

Next, you will write a quiz about proportional reasoning. you can use a calculator. Hand in.

Finally, we will look at how to solve word problems that involve similar triangles. Read over the note. Practice using the textbook questions on PG 33-35 #5, 7, 12.

You can also finish any questions from the previous class.

 

Tuesday September 27, 2016

Learning Goal:
We are learning to define key terms in math
We are learning to apply proportional reasoning to similar triangles

Tuesday Warm-up: Solve-Me Mobile

We will take up the activity on PG 19 of your text to define the properties of similar triangles. We will summarize your findings on an anchor chart.

Next, I will model an example – using the same process as converting units. Now you will try with a partner on some vertical space. Make sure to get your work checked. More practice can be found on PG 26-27 #1, 3, 4, 8, 11

If you were away, you can see the notes here.

 

September 26-27, 2016

Learning Goal:
We are learning to define key terms in math
We are learning to apply proportional reasoning to similar triangles

Monday Warm-Up: Visual Patterns

We will use this document to solve visual patterns and create equations.

If you have been away, get a device and watch Solving Proportions. Take notes!

We have been using proportions to convert units. Today, we will use the same ideas in a new situation!

Wharf Crane - WellingtonCreative Commons License Michael Coghlan via Compfight

Similar triangles! We will be using a textbook today. We will begin by scanning the text – section 1.3. What key terms will we have to know by the end?

Follow the instructions on PG 19 of your text to investigate the properties of similar triangles. We will summarize your findings on an anchor chart.

Next, I will model an example – using the same process as converting units. Now you will try with a partner on some vertical space. Make sure to get your work checked. More practice can be found on PG 26-27 #1, 3, 4, 8, 11