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How to solve this question?
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How to solve this question?

How to solve this question?-example-1
User Mandarin
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1 Answer

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Look at the picture.


\tan\theta=(5)/(4)\\\\\tan\theta=(10)/(x)\to(10)/(x)=(5)/(4)

cross multiply


5x=10\cdot4\\5x=40\ \ \ \ |:5\\x=8\ cm

|QR| = 13cm + 8cm = 21 cm

How to solve this question?-example-1
User Deloki
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