Question
Download Solution PDF∆ABC-তে, AD হল মধ্যক এবং G হল AD-এর কেন্দ্রবিন্দু যেখানে AG: GD = 2 : 1, তাহলে ar (∆BDG) : ar (∆ABC) এর মান কত?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFআমরা জানি যে,
AD মধ্যমা, তাই AD ত্রিভুজকে দুটি সমান অংশে ভাগ করে
ar ΔADB = ar ΔADC
ΔABD তে
⇒ ar ΔBDG/ar ΔBGA = DG/AG
⇒ ar ΔBDG/ar ΔBGA = 1/2
ধরা যাক, ΔBDG এর ক্ষেত্রফল = 1 একক
সুতরাং, ΔBGA এর ক্ষেত্রফল হবে = 2 একক
অতএব, ΔBAD এর ক্ষেত্রফল = ar ΔBDG + ar ΔBGA = 1 + 2 = 3 একক
ΔABC এর ক্ষেত্রফল = 2 x ar ΔBAD = 2 x 3 = 6 একক
∴ ar ΔBDG : ar ΔABC = 1 : 6
Last updated on Jun 13, 2025
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