x = √( 15² - 12² )
x = √( 225 - 144 )
x = √81
x = 9
L = 1/2 × a × t
L = 1/2 × ( 20 + 9 ) × 12
L = 29 × 6
L = 174 cm²
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Verified answer
x = √( 15² - 12² )
x = √( 225 - 144 )
x = √81
x = 9
L = 1/2 × a × t
L = 1/2 × ( 20 + 9 ) × 12
L = 29 × 6
L = 174 cm²