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Mathematics 19 Online
OpenStudy (anonymous):

find the area of the trapaziod, #'s 4 and 5 picture attached

OpenStudy (anonymous):

OpenStudy (amistre64):

#4 is the average of your bases * height

OpenStudy (mertsj):

Add the two bases, multiply by the height and divide by 2

OpenStudy (amistre64):

5 still has 90s in the middle right?

OpenStudy (anonymous):

so 12+18*9 devided by 2

OpenStudy (mertsj):

yep

OpenStudy (amistre64):

if we average the diagonals in % we should get the "square" diagonal to work from

OpenStudy (amistre64):

%..5 lol

OpenStudy (anonymous):

okay and what about #5 that ones a little diferent

OpenStudy (amistre64):

i used to square long walla by taking the diagonal ofa short section and averaging how far they were off and splitting the difference ... just wondering how that whould apply here :)

OpenStudy (anonymous):

oh, so how do i do it?

OpenStudy (amistre64):

ideally by learning formulas from the book

OpenStudy (amistre64):

otherwise you gotta go on the fly like me :)

OpenStudy (amistre64):

does a rhombus have 90s in the center?

OpenStudy (anonymous):

idk are you asking me or do u not know?

OpenStudy (amistre64):

i cant recall alot in geometry, never really use it much

OpenStudy (anonymous):

oh

OpenStudy (amistre64):

you seem to have 2 tria that are based by 13 and heighted by 4.5

OpenStudy (phi):

I'm sure if you look in your book you will find the area of a rhombus is A= D1*D2 /2 where D1 and D2 are the diagonals

OpenStudy (amistre64):

that might work too :)

OpenStudy (amistre64):

(13*4.5) ------- * 2 = 13*4.5 so yeah 2

OpenStudy (anonymous):

so 58.5

OpenStudy (phi):

yes

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