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ienarancillo
Group Title
Given quadrilateral ABCD with AB = 47, BC = 31, CD = 61, angle B = 117 deg and angle C = 76 deg. FIND:
1. AD
2. angle A
3. angle D
4. AC
5. BD
NEED YOUR HELP PLEASE! GONNA PASS THIS TOMORROW! THANKYOU!
 2 years ago
 2 years ago
ienarancillo Group Title
Given quadrilateral ABCD with AB = 47, BC = 31, CD = 61, angle B = 117 deg and angle C = 76 deg. FIND: 1. AD 2. angle A 3. angle D 4. AC 5. BD NEED YOUR HELP PLEASE! GONNA PASS THIS TOMORROW! THANKYOU!
 2 years ago
 2 years ago

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ajprincess Group TitleBest ResponseYou've already chosen the best response.0
Have u got a diagram for this @ienarancillo?
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
no @ajprincess . :( sorry. it's my homework and i really can't understand. PLEASE HELP
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
last one please. @ajprincess In the figure, DB =16, angle BAD = 13 deg and angle ABD = 22 deg. Solve for CD. THANKYOU!
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
@Callisto please help. :'(
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Are you posting two questions here?
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
yes sir. :)
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Not sir :S I'm not a guy. Please do not post two questions in a single post! For the first question, since the diagram is not given, we need to draw one ourselves. dw:1350743930628:dw Step 1: find BD, can you?
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
OMG! sorry! i didn't mean to! :'(
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
It's okay :) Can you find BD?
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
By considering triangle BCD.
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
i'm going to try solving it now. :)
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Tell me if you need some hints or so.
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
can i have a hint please. i am very confused in finding the angles which are along the transversal lines. :(
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Use cosine law. a^2 = b^2 + c^2  2bc cosA
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
awww. thanks.
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Can you find BD now?
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
so.. i drew a separate triangle for this.
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
\[\sqrt{76^{2}+31^{2}2(76)(31)\cos(76)}\] = 69.7 BD = 69.7
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
sorry it took so long. :"(
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
@Callisto Is this correct? please help.
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Is CD = 6 or 76??
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
CD = 61 :)
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
You typed CD = 6 :S Anyway. No, it's not correct though :
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
OMG! so sorry again! :(
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
then what should i do next? :)
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
how should i find the angles? :)
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
You have to find BD first, and the BD you found is not right. Plug in 61 instead of 76
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
oh. sorry. is it 61.4? @Callisto
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Yup. Next step: Find angle CBD
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
i used sine law for this. \[\frac{ \sin 76 }{ 61.4 } \frac{ \sin \angle CBD }{ 61 } = 74.6 degrees\]
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
@Callisto is this it? :)
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Yup. So, now, find angle ABD.
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
11 61.4 = 42.4 :)
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
i menat 117  61.4 = 42.4
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
*meant
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
@Callisto what should i do next? thanks so much for ur help.
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Next?! Find AD :D By considering triangle ABD.
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
sorry. honestly, i ought to do the same thing. :D
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Hmmm you mean?
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
uhmm, i was solving it before you replied. i asked you just to be sure. :D is this correct? :) @Callisto
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Wait. It should be 117  74.6 = 42.4 And the answer you've got is wrong..
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
OMG. so sorry again, i just typed it wrong. but i guess, 42.4 is right? :)
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
and is my AD correct? :)
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
I think so :
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
sorry. i'll sum up all the remaining 3 answers. im sorry to bother you. but im in the process of understanding it now. :)
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
It's okay :) Glad that you're understanding it now :)
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
are my answers correct? :)
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
@Callisto :D
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Wait... AD isn't 41.8
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
It's close to 41.8, but not 41.8
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
carelessness of mine. it's 41.4? :O
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
but it's math error when i'm solving for angle a.
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
It should be sin A/ BD = sin angleABD / AD
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
yes. i did that. \[\frac{ \sin \angle A }{ 61.4 }\frac{ \sin 42.4 }{ 41.4 } = MATH ERROR\]
 2 years ago

Callisto Group TitleBest ResponseYou've already chosen the best response.2
Hmm.. can you round your answer above to 4 d.p.? That way, you can get the answer!
 2 years ago

ienarancillo Group TitleBest ResponseYou've already chosen the best response.0
uhmm, our instruction says 'all answers must be rounded off to the tenths place'. :'(
 2 years ago
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