Question
Download Solution PDFसमद्विभुज त्रिकोण ABC मध्ये, AB = AC = 26 सेमेी आणि BC = 20 सेमेी असल्यास, ABC त्रिकोणाचे क्षेत्रफळ काढा.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिलेल्याप्रमाणे:
समद्विभुज त्रिकोण ABC मध्ये,
AB = AC = 26 सेमी आणि BC = 20 सेमी.
गणना:
ABC या त्रिकोणामध्ये,
∆ADC = 90° (समद्विभुज त्रिकोणातील मध्यबिंदूवर विरुद्ध शिरोबिंदूपासून असमान बाजूपर्यंत रेषेने तयार केलेला कोन 90° आहे)
तर,
AD² + BD² = AB² (पायथागोरस प्रमेयानुसार)
⇒ AD² = 576
⇒ AD = 24
त्रिकोणाचे क्षेत्रफळ = ½(पाया × उंची)
⇒ ½(20 × 24) (त्रिकोणाचे क्षेत्रफळ = (1/2) पाया × उंची)
⇒ 240 सेमी²
∴ योग्य निवड पर्याय 2 आहे.
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