kak jawab nomor Abc yg soal paling bawah,,,please hari ini dikumpul

jawab
jarak dua titik (x1,y1) , (x2,y2) = r=√{(x1-x2)^2 +(y1-y2)^2}

a. (10,20), (13,16)
r = √(10-13)²+(20-16)² =√(-3)²+(4)² = √(9+16) = √25 = 5

b. (15, 37), (42, 73)
r = √(15-42)² +(√37-73)² = √(-27)² +(-36)² = √2025 = 45

c. (-19,-16) , (-3, 14)
r = √(-19-(-3))² + √(-16-14)² = √(-16)² +(-30)² = √1156= 34