Questions I don't get (2 Viewers)

[MrBrightside]

well his final answer was right :/

 

[SpiralFlex]

Terribly sorry Mrbrightside

Can't upload, give me a second.

 

[MrBrightside]

Terribly sorry Mrbrightside

Can't upload, give me a second.

ahaha, Yeah i dunno i worked out all 3 distances of sides but still can't get the 1 1/4 ans ----My brain is slowly melting

 

[SpiralFlex]

Brightside,

Sub XY = sqrt20

YZ = 5/4

ZX = (sqrt185)/4

Into Cos z = (5/4)^2 + (sqrt(185)/4)^2 - (sqrt20)^2 all over 2 x 5/4 x sqrt(185)/4

z = 143.9726266

Area = 1/2 x 5/4 x sqrt(185)/4 x sin (143.9726266)

 

[MrBrightside]

Brightside,

Sub XY = sqrt20

YZ = 5/4

ZX = (sqrt185)/4

Into Cos z = (5/4)^2 + (sqrt(185)/4)^2 - (sqrt20)^2 all over 2 x 5/4 x sqrt(185)/4

z = 143.9726266

Area = 1/2 x 5/4 x sqrt(185)/4 x sin (143.9726266)

i did D XY = sqroot 89/16

 

[SpiralFlex]

No, XY is sqrt20. You were right first time, I strongly advise you to plot these points first.

 

[SpiralFlex]

XY = points (3,2) and (-1,0)

XY = sqrt[(0-2)^2 + (-1-3)^2]

XY = sqrt 20

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YZ = points (-1,0) and (1/4,0)

You don't even need distance formula for this, distance from eye is 5/4 (Plot and see)

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ZX = points (1/4,0) and (3, 2)

ZX = sqrt (2-0)^2 + (3-1/4)^2

ZX = (sqrt(185))/4

 

[MrBrightside]

ahh yes finally got it 1 1/4. it's funny how if you use degrees, minutes and seconds in the last part, u get an ans slightly off. You have to use the decimal to get the right answer. thanx spiral

 

[SpiralFlex]

ahh yes finally got it 1 1/4. it's funny how if you use degrees, minutes and seconds in the last part, u get an ans slightly off. You have to less the decimal to get the right answer. thanx spiral

Glad to help, funny how one silly mistake will waste 1 page of a thread.

 

[cormacshaw]

Where are these questions from? Just curious..

They're from MIF:

X is (3,2) Y is (-1,0) WHAT am i doing wrong ? i even tried urs in this thread its same thing as me, the one u did on sheet is different but i don't know how you got it. i'm using MIF.