Per NCERT, the area of an isosceles triangle with two equal sides a and base 2b is given by which expression — using the Baudhāyana–Pythagoras height result?
A2ab square units
Bb × √(a² − b²) square units
Cab square units
D½ab square units
Answer & Solution
Correct answer: B. b × √(a² − b²) square units
Area = ½ × base × height = ½ × 2b × √(a² − b²) = b√(a² − b²). The other options misapply.
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