Szczegółowe wyjaśnienie:
A.
a) AB = √( (1-1)²+(4-2)² ) = √4 = 2
BC = √( (1-(-2))²+(4-4)²) = √9 = 3
CD = √( (-2-(-2))²+(4-0)²) = √4 = 2
b) AB = √( (3-1)²+(5-5)²) = √4 = 2
BC = √( (3-3)²+(5-(-2))²) = √49 = 7
CD = √( (3-2)²+(-2-(-2))²) = √1 = 1
B.
a) AB = √( (2-1)²+(5-3)²) = √(1+4) = √5
BC = √( (5-2)²+(1-5)²) = √(9+16) = √25 = 5
CD = √( (2-5)²+(4-1)²)= √(9+9) = √18 = 3√2
b) AB = √( (-9-3)²+(2-(-3))²) = √(144+25) = √169 = 13
BC = √( (-7-(-9))²+(-2-2)²) = √4 = 2
CD = √( (-3-(-7))²+(-3-(-2))²) = √(16+1) = √17
