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A. Double
B. Triple
C. Four times
D. Half

A. 3√3a²/2
B. √3a²
C. 6a²
D. 2√3a²

A. √(l² + b² + h²)
B. l + b + h
C. lb + h
D. lbh

A. Side × side
B. ½ × diagonals
C. Base × height
D. l × b