11)A square and an equilateral triangle have equal perimeters. If the diagonal of the square is 12√2 cm, the area of the triangle is
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let square has side a and triangle it given , = 4a = 3t
= a = 3/4 t diagonial of square
= √2a
= √ 2a = 12√2
= a = 12 cm = t = 4/3 × 12 = 16 cm
area of eaqulateral triangle
= √3/ 4 t2
= √3/4 (256)=64 √3
OK
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