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25+16=x²
x²=41
x=√41
3²+5²=y²
9+25=y²
y²=34
y=√34
b)4²+3²=a²
16+9=a²
a²=√25
a=5
4²+4²=y²
16+16=y²
y²=32
y=√32
4²+5²=x²
16+25=x²
x=√41
c)10²+16²=x²
100+256=x²
356=x²
x=√356
10²+4²=y²
100+16=y²
y=√116
10²+10²=z²
100+100=z²
z²=200
z=√200
10²+5²=a²
100+25=a²
a²=125
a=√125