Qualification > Math

Can you answer this question please

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NotAbod:

--- Quote from: Flamed-Ghoust on November 08, 2013, 04:47:45 pm ---the triangle is not 90 degrees, so the SOH CAH TOA wont work... the sin rule also wont work cause i only have 1 angle and that angle is unknown, the cosine rule also wont work cause we only have one side and the other 2 are unknown, the biggest problem is that the intersection of AC isnt equal in size

--- End quote ---

AXB is 90 Degrees and I assume you know XB and AC is given as 12cm
Use SOHCAHTOA to find angle ABX (which is 1/2 of ABC)
ABX x 2 = ABC

Flamed-Ghoust:
how is angle ABX half od angle ABC????

NotAbod:
It's a kite and that diagonal (DB) cut the smaller triangle (triangle ABC) into 2 equal halves therefore ABX x 2 = ABC

Flamed-Ghoust:
oh, so u basically mean make an imaginery line ??

NotAbod:
Yes and no.
Yes if it's not there.
No in this case because it's already there, line BD

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