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Good afternoon everyone! Go ahead and pass in your homework from last night, take
out your notebooks and let’s get ready to write!
Today’s lesson is on solving right triangles using the Pythagorean theorem. A right
triangle is one that looks like this… can everyone see the board? Okay great!
In the figure I’ve drawn here on the board, you can see there are three sides. Now if we are
given two sides of a right triangle, we can solve for the missing side using the formula,
a^2 + b^2 = c^2, where c is always going to be this side here.
Any questions so far? No? Greeeeat! So solving these types of problems are a piece
of cake. All you have to do is take this side squared and add it to this side squared. And
then you take the square root of that sum and that will give you this other side squared.
Now you try this example here I’ve written on the board…..
Oh you have a question? Ok I’ll get to you in onnne second. Just let me finish taking
attendance. Ok so let’s deal with the answer to our first example here. Yes? Oh I never did
get your question…sorry about that. Well don’t worry about it, this stuff is easy. I’m sure
you’ll pick it up as we work a few more examples….
Ok I’ve drawn two triangles on the board.
Who can tell me if these two triangle are similar…..