#How to solve it?.

53 messages · Page 1 of 1 (latest)

golden zenith
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I know easy question but i can not solve it

20251109_204237.jpg
raw wadiBOT
golden zenith
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Dc=2ab

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Degree of bcd=20

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Degree of cbd=90

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Degree of bad=?

raw wadiBOT
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How to solve it?.

sleek agate
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your diagram doesnt make sense at all ;-;

golden zenith
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But all information is these

sleek agate
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Your information contradicts each other

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Wait never mind

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I see it now

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So you have two angles

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What do you do to find the third angle in a triangle?

golden zenith
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I could not find

sleek agate
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So the angles of a triangle add to 180

golden zenith
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But the answer is 40 degree

sleek agate
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That doesn’t make sense

golden zenith
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Idk

sleek agate
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It should be 60

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No 70

golden zenith
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90-20=70

sleek agate
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Ye

golden zenith
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And..

sleek agate
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That’s the answer

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70

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That should be the answer at least

golden zenith
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It is not degree of bad,it is degree of bdc

thick sequoia
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oh you did mention it, my bad

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I do believe, judging by the first looks, trigonometry might be helpful in this type of a problem

glossy radish
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hold on - is DBC 90 degrees, or is ABC 90 degrees?

golden zenith
thick sequoia
golden zenith
glossy radish
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i was gonna say that this wouldve been a really easy problem

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if it was abc

golden zenith
glossy radish
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is 2x ac or dc

golden zenith
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Dc

golden zenith
glossy radish
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so dbc is a 90-70-20 triangle with hypotenues 2x

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bc is 2x*cos20

thick sequoia
# golden zenith Which method?

i am unfortunately in my bed right now and not able to manually solve the problem but I believe you can find BD and AD in terms of X and then evaluate the remaining angles through those side lengths, though i cannot state anything definitive right now, sorry

golden zenith
glossy radish
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I got it

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sin(20)/x=sin(A)/(2xcos20)

golden zenith
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And?

glossy radish
golden zenith
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Actually yeah

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Thank u all who helped at this question

glossy radish
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when trying to solve angles - use the law of sines

golden zenith