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3.
d=a√2
d=7√2
4.
10^2-6^2=x^2
x^2=100-36
x^2=64
x=8
3^2+6^2=x^2
x^2=9+36
x^2=45
x=√45
5.4^2+6^2=c^2
c^2=16+36
c=√52
c=2√13
6.
8^2+6^2=x^2
x^2=64+36
x=√100
x=10
7
P=a^2 √3/4
P=8√3/4=2√3
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3.
d=a√2
d=7√2
4.
10^2-6^2=x^2
x^2=100-36
x^2=64
x=8
3^2+6^2=x^2
x^2=9+36
x^2=45
x=√45
5.4^2+6^2=c^2
c^2=16+36
c=√52
c=2√13
6.
8^2+6^2=x^2
x^2=64+36
x=√100
x=10
7
P=a^2 √3/4
P=8√3/4=2√3