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cosα=√2/3 v=?
4a +4b=40
a+b = 10
cosα=√2/3 = 1/2a√2 / b
a=4
b=6
v=1/3 Pp * H
Pp= a²=4²=16
H²+ (1/2a√2)²=b²
H²=36-8=28
H=2√7
v= 1/3 * 16 * 2√7=32√7/3