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kenneyfamily
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If A=42.2degrees, B= 13.6degrees, and a=41.3, find area of triangle ABC
 2 years ago
 2 years ago
kenneyfamily Group Title
If A=42.2degrees, B= 13.6degrees, and a=41.3, find area of triangle ABC
 2 years ago
 2 years ago

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jayz657 Group TitleBest ResponseYou've already chosen the best response.1
we need to see how the triangle looks like otherwise we cant say anything about it
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.0
dw:1353222533411:dw Hmm i don't think it really matters what it looks like :D we have 3 pieces, angle angle side, so we should be able to figure something out. hmmmmmmmm This is not drawn to scale, so my bad :3 just to give us a rough idea. Angle B should be much smaller though :)
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.0
Area, hmmmmmmmm I'm trying to rememberrrrr :3
 2 years ago

jayz657 Group TitleBest ResponseYou've already chosen the best response.1
area of triangle = bh/2 how do you know what the height is?
 2 years ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
nope :(
 2 years ago

zepdrix Group TitleBest ResponseYou've already chosen the best response.0
We could use the information we have, solve for the missing sides using the law of sines or cosines or something, and then apply heron's formula... I'm not sure that is the most efficient way though XD hehe
 2 years ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
a)138.8 b)327.4 c)493.8 d)246.9 those are my choices
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
@zepdrix : Just use Tan to find the height and then use the triangle area formula.
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Ohh wait. It's not a right angle triangle.
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Use the law of sines then. Lot easier.
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
dw:1353223094929:dw
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Solve for b which is the height and then you have everything else.
 2 years ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
36.292 is the height right?
 2 years ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
is 41.3 the base?
 2 years ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
hmm thats not right
 2 years ago

jayz657 Group TitleBest ResponseYou've already chosen the best response.1
we do not know the height so use this formula Area = 1/2 ab sin(c) we need a side so use law of sines 41.3/sin(42.2) = b /sin(13.6) b = 14.4575 angle c = 180  42.2  13.6 = area = 1/2(41.3)(14.4575)sin(124.2) area = 246.93 so is D
 2 years ago
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