السلام عليكم
حل اللغز .
نفرض ان طول CK. هو X .
بما ان CB.يوازي Nm. وباستخدام قانون النسبه والتناسب في المثلثات .
فيكون. 2/4.5=5/(4.5+X)
فيكون X
X= 4.5× 5/ 2 - 4.5 = 6.75
CK = 6.75 .
وشكرا
م / عبدالمنان الروحاني
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