A problem that will be on the test.

Please watch as many times as needed.

Here is a video to help you with proportional parts and similarity.

March Madness Is A Go!!

We are asking for your help to promote MARCH CARENESS. Please help us by posting the following information to your student blog.

March Careness  is here!! What is March Careness? March Careness is our chance to give back to our community and help those in need.

It starts Tues. Mar.25^th and ends Apr.3^rd. During March Careness you can donate any of the following for a chance to win up to $500 in gift cards with two grand prizes of a $25 Visa card.

Here’s how the donations work:

●       Cans = 1pt.

●       Dry Foods = 2pts

●       Toiletries = 3pts

For every point you score your name will be entered into a drawing to win. For every 7pts you score you will receive 1 hour of community service. For every 10 points scored receive 2 hours of community service.

Bring your donations to the Hot Spot or Dragon Cafe.

Help support our community with March Careness.

Last year we raised over 840 items. Our goal this year is 1,000 items. If we meet our goal we will celebrate with an assembly on April 3.

A Quick Review for the Ch 7 Quiz!

The quiz on Friday, March 21 will cover a few topics:
1) Can you say five true statements about a picture based on Chapter 7? (What corresponding parts are similar to what?)
2) Can you find the height of a tree based on several pieces of information? Can you write down the setup? Can you draw a picture? (If Arion is 3 feet tall with a 5ft shadow, and the tree has a 10 ft shadow...what is the setup and height of the tree?)
3) Can you find the value of a letter given two similar polygons?

Here is a video that I found that might help you with number 3:



Here is another one:



Good Luck on the quiz!

This crazy week in Geometry - Similar Polygons.

This week in Geometry we are learning about applications of proportions using triangles and polygons. Here is an easy video discussing what we learned so far this week, concerning the mirror activity from Monday.

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In the video, the setup is little height over big height equaled to little shadow over big shadow.

In the video below, the teacher explains how to show that two polygons are similar. Here is another way, the corresponding parts are AE ~ QU and ED ~ UT. So when you divide AE by ED and divide QU by UT, you will get the same value. Check it out and see for yourself.

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Dilations in Chapter 7!

While talking about ratios, proportions and scale factors. We need to talk about dilations.
Here is a video on dilations.



Having watched the video, there are ways to prove that two shapes are dilations of each other:

• corresponding sides have the same slope
• corresponding sides have a common scale factor
• corresponding sides have distances that are multiples of each other
• the objects of an area that is a multiple of the scalar factor squared

Concentrate on finding the slopes of lines. That's the easiest to figure out above all other tests.


Apply the bullet points from above to the video below. Only pay attention to 0 minutes to 7:20 minutes. The rest we didn't cover and will not cover in class. Prove that the triangles are dilations. I will count is as extra credit if you turn this in by Friday, March 7, 2014.

Important Bellwork!

This bellwork is going to keep coming up in the next few weeks.

If the Earth takes 365.25 days to revolve around the Sun and is 1 astronomic unit from the Sun, how many astronomic units is Mars if it takes 686.9 days to revolve around the Sun? 

 

How many astronomic units is Saturn, if it takes 10832 days to revolve around the Sun?