Per NCERT Class 9 Math, what is the formula for the AREA of a rectangle with length a and width b?
Aa² + b²
Bab (length × width)
C2(a + b)
D½ab
Answer & Solution
Correct answer: B. ab (length × width)
Rectangle area = length × width = ab. The other options confuse it with perimeter, Pythagoras, or triangle area.
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