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9-6 Solving Right Triangles 1

Added Mar 22, 2017 •

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hey so this is yesterday's knows I think it's like the last three problems first. I think we finished number six but I figured hey I'll do it anyways it doesn't hurt to do extra work and that you guys have an extra example in something to look back on if you guys don't turn it these videos of stamp online for the rest of the year  the directions say solve the right triangle around the decimal and saw the right triangle turn the decimal answers to the nearest tenth so when it says solve the right triangle that means we have to find all of the thing so in this one we have to find end  angle D angle an angle s what time we also have to find all the sides DF Fe  and this is nice though cuz it gives the some of the answers so for Fe we have 20 play DF we have 20 and angle F we know is 90° so that leaves us to find all the rest of the information so I see that I have two side lengths and I want to find the third one so I'm going to call DEC  and I'm going to do 20 squared + 21 squared equals c squared some then 20 is 400 221 squared I'm sorry 21 square knot 221 is 441 c squared 400 + 441 841 play believe yesterday we decided that that meant that it was  29 equals c squared square root square root C equals 29 so now I know de is 29 but now we stopped to find your angle measures  let's say we want to find angle efirst angle is right here why is the numbers if they already gave us so from angle e what is 20 offset adjacent hypotenuse  opposite what is 21 opposite adjacent hypotenuse  this one is a Jason  using sohcahtoa which one uses Ops and adjacent  tangent does so we're going to do tan  the angler we were looking for equals opposite 20 / Jason which is 21 how do we get ear by itself yesterday  tan inverse  tan inverse so that I'm going to have equals tan inverse 20 / 21 calculator  what I'm doing can I got 46 points so angle e 46 43.6 x i until then up here 43.6  I know if I have two angles can I find the third answer is yes Fuso for angle d I'm going to add 43 plus  43.6 what's 90 and then subtract it from 180  and I got 46.4 sodium to get D at your two angles that they already gave you these two and then subtract from 180 and the should be degrees also guys are not to do not give sign sides degree measurements not is wrong and I went to probably Marquis wrong because at this point in time you guys should know the Prince between a side and an angle I want the video to be too long so I'll stop by here to do number 7 and then quanta next one

Uploaded by Lauren Stouffer.

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9-6 Solving Right Triangles 1

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