Question
Download Solution PDFΔABC आणि ΔDEF हे समान त्रिकोण आहेत आणि त्यांचे क्षेत्रफळ अनुक्रमे 49 सेमी2 आणि 144 सेमी2 आहेत. जर EF = 16.80 सेमी, तर BC काढा.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिलेल्याप्रमाणे:
ΔABC आणि ΔDEF हे समान त्रिकोण आहेत आणि त्यांचे क्षेत्रफळ अनुक्रमे 49 सेमी2 आणि 144 सेमी2 आहेत.
EF = 16.80 सेमी
वापरलेली संकल्पना:
जर दोन त्रिकोण सारखे असतील, तर दोन्ही त्रिकोणांच्या क्षेत्रफळाचे गुणोत्तर त्यांच्या संबंधित बाजूंच्या गुणोत्तराच्या वर्गाच्या प्रमाणात असते.
गणना:
ΔABC आणि ΔDEF समान त्रिकोण असल्याने,
\(\frac {AB}{DE} = \frac {BC}{EF} = \frac {AC}{DF} = \sqrt { \frac {area (\Delta ABC)}{area (\Delta DEF)}}\)
\(\frac {BC}{EF} = \sqrt { \frac {area (\Delta ABC)}{area (\Delta DEF)}}\)
⇒ \(\frac {BC}{16.80} = \sqrt { \frac {49}{144} }\)
⇒ BC = 7/12 × 16.80
⇒ BC = 9.8
∴ BC ची लांबी 9.8 सेमी आहे.
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