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Mathematics 8 Online
OpenStudy (anonymous):

check please

OpenStudy (anonymous):

Parth (parthkohli):

Hint: You must use the following theorems. 1) Distance formula for finding the lengths of all the sides. 2) Pythagorean theorem for confirming that we have a right triangle. 3) Heron's formula for finding area.

OpenStudy (anonymous):

yeah i did that i just wanted my answers to be checked

OpenStudy (anonymous):

for the sum of the squares of the length of the legs i got 45 and for the square of the lenght of the hypothenuse i got 45 then the area i got 10.67

hartnn (hartnn):

sum of the squares of the length of the legs is incorrect

hartnn (hartnn):

how did u get 45 ?

OpenStudy (anonymous):

i meant 65 my bad

hartnn (hartnn):

65 is correct

hartnn (hartnn):

u wrote 45 there

hartnn (hartnn):

area is incorrect

OpenStudy (anonymous):

so they are both 65 and area 10.67?

hartnn (hartnn):

they are both 65 <----correct area is not 10.67

hartnn (hartnn):

what are the lengths of legs u got ?

OpenStudy (anonymous):

i have d(A,B)=4 d(b,c)=sqrt65 and d(a,c)=7

hartnn (hartnn):

yes, so legs are 4 units and 7 units area is half the product of legs

OpenStudy (anonymous):

14?

hartnn (hartnn):

yup

OpenStudy (anonymous):

can you check something else for me? last one

hartnn (hartnn):

sure

OpenStudy (anonymous):

hartnn (hartnn):

not symmetric w.r.t y axis (-2,0) is correct

OpenStudy (anonymous):

no? then which one?

hartnn (hartnn):

if u flip the upper half and lower half, u get the same graph, here x-axis remains axis of symmetry

OpenStudy (anonymous):

hmm i see

OpenStudy (anonymous):

so (3,0) would be x-axis too?

hartnn (hartnn):

sorry what ? where does 3,0 come from ??

OpenStudy (anonymous):

its another example lol

hartnn (hartnn):

ok.

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