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3²+6²=9+36=45
√45=3√5
Przekątna ma dł. 3√5
b)
√18×√2=√(18×2)=√36=6
Przekątna ma dł. 6
d=√a²+b²
d=√9+36
d=√45=3√5
2)
d=a√2
a=√18
d=√18*√2=√36=6
a = 3 cm
b = 6 cm
d² = a²+b²
d² = 3²+6²
d² = 9+36
d² = 45
d = √45
d = 3√5 cm
b)
a = √18 cm
d = a√2
d = √18*√2
d = √36
d = 6 cm