Wednesday, May 29, 2013

Part ll Day 7

Daily objective- Similar triangles
Deffinition- Students will be able to apply what we learned about similar triangles from day 6 to a real life sensereo.

Lets review what a similar triangle is again? Its the same idea as what we leared on day 5 and day 6. We use proportunes of similar figures to find missing lenghths.

EXSAMPLE FROM DAY 5.

From the information were given were able to find x. For this problem the proses would befirst making   fractions. 2/8 and x/16. This means that is 8 is double 16. X would be double 2. The ANSER would be 4

This proses can be used for real life scenarios espeshaly with triangles.
Example- let's say you half to find the hight of a tree using the shadow. This sets up a perfect triangle where you can use similar triangles to find the missing side.(the hight!)
Because we know the actual high of the small tree we can find the actual high of the big tree. We follow the same proses as previous days 5and6. 3 is 1/10 30. So three is 10times 2. The tree will be 20feet tall.

-We can serenely use similar triangles and shapes in real life situations.

                                                                       QUIZ-TIME!!!!!
1.) What example did I use in this post to set up a problem like this?
2.)If there's a small tree with a shadow of 10 feet and a high of 20 feet. What will the hight of a tree be if the large tress shadow is 20 feet.

3.))If there's a small tree with a shadow of 30 feet and a high of 60 feet. What will the hight of a tree be if the large tress shadow is 20 feet.

ANSWER KEY
1.) I used the high of the tree in relationship to the shadow of the tree.
2.) We see that the shadow is 1/2 the actual high from the small tree. So the high of the actual large tree will be 2xs it's shadow size. 20x2=40 the large tree will be 40feet tall.
3.)We see that the shadow is 1/2 the actual high of the tree. So the length of the small trees shadow is 2xs it's 20foot shadow. The tree will be 40feet tall.

Cheak this video out to get a review on similar figures!!!













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