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Mathematics 54 Online
OpenStudy (anonymous):

A kite has diagonals of 18 inches and 21 inches as seen below. What is the perimeter of the kite?

OpenStudy (anonymous):

OpenStudy (anonymous):

first you have to find the hypotenuse of both triangles

OpenStudy (anonymous):

12?

OpenStudy (anonymous):

and 9?

OpenStudy (anonymous):

you have to use this formula c^2=a^2+b^2

OpenStudy (anonymous):

I know that part :b

OpenStudy (anonymous):

ok plug the a and b in and the you will find c :)

OpenStudy (anonymous):

theres two triangles in the kite so for the first on the a=9 and b=9 for the second one the a=9 and the b=12

OpenStudy (anonymous):

after you find the c for both triangles you will have the side lengths

OpenStudy (anonymous):

I already did that and got 225 and got the square root of 15.

OpenStudy (anonymous):

I mean sqrt of 225 which =15

OpenStudy (anonymous):

show me wht you did for the little triangle with a=9 and b==9

OpenStudy (anonymous):

I don't know what you mean D; I'm just trying to find the perimeter

OpenStudy (anonymous):

lol you need the hypotenuse to know the perimeter

OpenStudy (anonymous):

its 15

OpenStudy (anonymous):

the hypotenuse=15

OpenStudy (anonymous):

9^2+9^2=162 -.- and 162 sqaure rooted is 12.7

OpenStudy (anonymous):

so the hypotenuse is 12.7? what about the 12? don't you need 12 to find the hypotenuse?

OpenStudy (anonymous):

then for the other triangles hypotenuse its goin to be 9^2+12^2 which equals 225 and 225 sqaure rooted is 15

OpenStudy (anonymous):

so now you have the side measurements you can round 12.7 to 13

OpenStudy (anonymous):

so its 13+15+13+15

OpenStudy (anonymous):

thats your perimeter

OpenStudy (anonymous):

where does the 13 come from, you round up?

OpenStudy (anonymous):

yes i rounded 12.7 to 13

OpenStudy (anonymous):

so its 56 or 55.4 without rounding the 12.7

OpenStudy (anonymous):

hoped this helped :)

OpenStudy (anonymous):

yes so much !!!!! thankyouuuuu!!!!!!!!! :))))))))

OpenStudy (anonymous):

your welcome ^.^ :D :)

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