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1/2 d :1/2 d1 =3/4
1/2d =3x
1/2d1=4x
(3x)² +(4x)² =a²
9x²+16x²=8²
25x²=64
x² =64/25
x=√(64/25)
x=8/5
d=2*3x =6*8/5 =48/5
d1=2*4x=8*8/5 =64/5
P=d*d1/2
P=48*64/(5*5*2) =3072/50
P=ah
h=P/a
h=3072/(50*8)= 3072/400
h=7,68
r=1/2 h
r=7,68:2
r=3,84