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2√3*5√3 = 30cm²
b)
3√2*½2√2 = 6cm²
c) (2√5+3√5)*√15/2 = 5√5*√15/2 = 10√3/2 = 5√3
b)a*h= (2√2+√2) *2√6/3=2√12=4√3
c)0,5**(a+b)*h=0,5* (2√5 + 3√5)*√15=0,5*5*15=37,5
P = ab
P = 2√6 *5√3
P = 10√18
P = 30√2
b)
P = ah : 2
P =((2√2+√2)(2√6/3)) : 2
P =(3√2*(2√6/3)):2
P = (2√12) :2
P = √12
P = 2√3
c)
P = ab:2*h
P = (2√5*(2√5+√5)):2*√15
P = 6√5:2*√15
P = 3√75
P = 15√3