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Mathematics 8 Online
OpenStudy (anonymous):

What is the magnitude and direction of GH if G(3, -2) and H(6, 4)

OpenStudy (amistre64):

G to H is defined as H-G

OpenStudy (anonymous):

magnitude: 6.71 units; direction 63.43° magnitude: 6.71 units: direction: 26.57° magnitude: 3.61 units; direction: 26.57° magnitude: 3.61 units: direction: 63.43°

OpenStudy (amistre64):

this question again? we dont even need to determine the exact numbers to pick the right answer

OpenStudy (anonymous):

i dont quite understand how to depict the answer tho

OpenStudy (amistre64):

what do you get when you subtract the parts of G from the parts of H? H(6, 4) -G(3, -2) --------- ? , ?

OpenStudy (anonymous):

3, 6

OpenStudy (amistre64):

good, this defines a right triangle with legs of 3 and 6; the hypotenuse is its magnitude; and as a rule of right triangles, that length has to be larger than any of the sides can you narrow it down with this?

OpenStudy (anonymous):

so do i square 3 then square 6 and then add them and thats my magnitude ?

OpenStudy (amistre64):

you can if need be. but lets just find the answers that have a magnitude greater than 6

OpenStudy (amistre64):

|dw:1348416709517:dw|

OpenStudy (anonymous):

so its between the first 2 ?

OpenStudy (amistre64):

correct :) now, another property of right triangles, is that a 45 degree angle has equal size legs

OpenStudy (amistre64):

|dw:1348416809819:dw| according to this, we want an angle that is larger tahn 45 right?

OpenStudy (anonymous):

rightt

OpenStudy (amistre64):

so, a magnitude greater than 6 and an angle greater than 45 only one of the options fits

OpenStudy (anonymous):

wich is the first one ? rioght !! thanks soo muchhh

OpenStudy (amistre64):

first one yes :) and we didnt even need to know the exact values ;)

OpenStudy (anonymous):

trueee . can you help me wikth another one

OpenStudy (amistre64):

maybe, i only have a limited number of smarts that i can use during the day; and i have already answered a few questions ....

OpenStudy (anonymous):

aww man well one more wont hurt

OpenStudy (amistre64):

if i break a synapse on the next one, you have to pay for the brain surgery :)

OpenStudy (anonymous):

ok dealllll Josie pulls a bookcase up a ramp to load it into a truck with a force of 59 N. The force moving the bookcase vertically upwards is 25 N as shown in the diagram What is the angle of the ramp to the ground

OpenStudy (amistre64):

|dw:1348417137760:dw| what trig definition do we know that uses opposite and hypotenuse?

OpenStudy (anonymous):

wait heres the picture

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