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(h₁)²+1²=16*5
(h₁)²=80-1
(h₁)²=79 /√
h₁=√79
(h₂)²+(½*4)²=(4√5)²
(h₂)²+(2)²=16*5
(h₂)²=80-4
(h₂)²=76 /√
h₂=√76=√(4*19)
h₂=2√19
Pc=Pp+2*½*2*h₁+2*½*4*h₂
Pc=2*4+2√79 +4*2√19
Pc=8+2√79 +8√19
Pc=2(4+√79+4√19)
2²+4²=d²
4+16=d²
d²=20=4*5 /√
d=2√5
H²+(½d)²=(4√5)²
H²+¼d²=16*5
H²+¼*20=80
H²=80-5
H²=75=25*3 /√
H=5√3
V=⅓Pp*H
V=⅓*2*4*5√3
V=40/3 √3