nikki156789
26. Calculate the perimeter of triangleDEF
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a. 39.28
b. 40.32
c. 45.82
d. 72
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phaizzpham
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is there like an image you could draw out?, it would make it simpler if there is an image
nikki156789
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|dw:1332541848602:dw|
nikki156789
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what does the degree?
nikki156789
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ok?
nikki156789
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myko that comes out to not an option
nikki156789
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it comes out to 42
phaizzpham
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this one is a tricky one let me try again
myko
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|dw:1332542529410:dw| what this means?
phaizzpham
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yeah that is throwing us off
nikki156789
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idk which is why i dont understand it
myko
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actualy, my bad, there is no solution i guess with the info you have
phaizzpham
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r u positive that it is a t?
nikki156789
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no its like an angle thing with a line through it.
phaizzpham
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ahh thats means perpendicular i would think
myko
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maybe it means that this top angle is half of the bottom ones?
nikki156789
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idk which is why im having trouble doing this problem
phaizzpham
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ive done that and i figured out the height which is six, but idk how to apply it to figure out the parameter
SUROJ
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|dw:1332543779552:dw|
phaizzpham
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i think the answer is 40.32
SUROJ
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any reason behind that?
nikki156789
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SUROJ be nice
nikki156789
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how'd you get 40.32?
phaizzpham
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|dw:1332543858044:dw| well i tried to find the height which is 12 using the h=root3*s/2 formula, then i cut the triangle in half, then applied the A^2+B^2=C^2 to find one of the sides which is 13.89 then added all of them together which is 2*13.89+14 which is 41.78 so it could be 40.32 lol
nikki156789
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oh ok:)
phaizzpham
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i could be wrong tho D:
nikki156789
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:/
SUROJ
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is that equilateral triangle?
phaizzpham
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yeah it should be
nikki156789
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i dont think so
nikki156789
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no its not cuz only two sides are the same
phaizzpham
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or an isolyze triangle ?
nikki156789
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its an isosceles triangle
SUROJ
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yes
phaizzpham
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okay let me try again lol
nikki156789
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ok
nikki156789
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|dw:1332545361479:dw|
SUROJ
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72
nikki156789
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thats the 2nd triangle
nikki156789
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so the perimeter of def is 72?
SUROJ
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wait that is 42.8
SUROJ
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yea the perimeter
SUROJ
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sorry 45.8