भुजा (9+1) वाले वर्ग का क्षेत्र दृश्य पहचान से किस योग के बराबर है?
Using the visual identity, the area of a square with side (9+1) equals which sum?
Explanation opens after your attempt
B. (81+18+1)
Concept
In ((9+1)2), \(9^2\), two (9) rectangles, and \(1^2\) are added. Exam tip: do not forget the two equal rectangles.
Why this answer is correct
The correct answer is B. (81+18+1). In ((9+1)2), \(9^2\), two (9) rectangles, and \(1^2\) are added. Exam tip: do not forget the two equal rectangles.
Exam Tip
((9+1)2) में \(9^2\), दो (9) आयत और \(1^2\) जुड़ते हैं। परीक्षा में दो समान आयतों को न भूलें।
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