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9-2 Day 2 Special Right Triangles video 3 (3-10-17)

Added Mar 09, 2017 •

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hi guys is there a last two problems I think and they are exactly the same as the ones before this is an Adele triangle find the area so again we know area  equals base times height divided by since they don't give us an equilateral triangles since they don't give us an equilateral triangle this time I'm just going to I wasn't going to be a triangle triangle  and side lengths are 6 cm my drama height down the middle  and I haven't ate fear can't remember what's mining the high I only need half of the triangle so now I'm going to reschedule half the triangle that I need this is 30 6090  half of 6 gives me 3 cm up top and this is my height  I'll sketch from both triangles up here the formulas can you pronounce here's 30-60-90 always across from 30 is X always across from 60 is X red three always across from 90 is 2x so in my picture right here I have 3 cm and that's across from 30 so that you H is across from 60 I'm not equals x red 3 does X right here is the same as this x-ray here so I'm going to take  this 3 and plug it in right there 4X so now I have 3 rat 3 equals H and I'm done  split but I still got to plug it back in to find the area is 6 high is 3 rad 3 all / 2 Stop Those little hard to read 3 times next is 1818 / 2 is 9 / 3 and that is centimeters squared next one of a dump truck is raised to empty a load of sand how high is the 14ft long body from the play when it's tipped upward by degree of 60° all right here it's a little easier for me to see and work with  this is 6030 90 + there Plano statuses 14 feet how high so again we want to know what is that distance  alright well now I have 14 ft in from our picture up above count 14 ft equals 2x so divided by 2 divided by 2 and now I know x equals so that means this bottom right here is 7 but I'm trying to find height high is across from 60 and I know 60 equals x Run 3  so I'm going to take this  cuz this acts in this x are the same can I take this 7 unplug it in h equals 7 rad 3 and a talking about so the height of the dump truck is 7 Rand 3 feet hopefully guys have time to get started on your homework snot had a wonderful time at the assembly today make sure she'll real hard make me proud I'll see you guys next Tuesday having a fantastic friday wonderful weekend

Uploaded by Lauren Stouffer.

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9-2 Day 2 Special Right Triangles video 3 (3-10-17)

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