Review Day 2

​Today we will be using chromebooks/laptops. If you don't have one, that's ok! You may follow along using a piece of paper.

​Can the following side measures form a triangle?  3, 5, 8

yes or no? 

first side + second > third side

​Let's look at our example:

3, 5, 8​

Range is given by:

(big number-small number) between (big number+small number)

​

​The third side must be bigger than _____ but smaller than ________.

​

​A. 12<x<22

​B. 10<x<23

​C. 13<x<21

​D. 15<x<23

​

(big number-small number) between (big number+small number)

17-4 between 17+4​

​

​​The third side must be bigger than 13 but smaller than 21.

​

​A. 12<x<22

​B. 10<x<23

​C. 13<x<21

​D. 15<x<23

​a=

​b

​y

​35°

​This theorem states that:

​If two sides are equal, the angle they face will also be equal!

In this problem, the two sides of the triangle are the same!

​

​35°

​

​So we can label them both as x.

Now, set-up our equation:

​x+x+35 = 180

​2x+35=180

​x = 72.5

​35°

x

x