Coordinates

x-coordinate is 0, They form a vertical line, Distance from y-axis is 0

Points on the y-axis have x-coordinate = 0 (not y-coordinate = 0). They form a vertical line and are at zero distance from the y-axis itself.

5

Step 1: Use distance formula from origin: d = √(x² + y²). Step 2: d = √(3² + 4²) = √(9 + 16) = √25 = 5 units.

Side from (1,2) to (4,2), Side from (1,5) to (4,5)

Sides parallel to x-axis have the same y-coordinate at both endpoints. Sides (1,2)-(4,2) and (1,5)-(4,5) both have constant y-coordinates.

5

Step 1: Use distance formula: d = √[(x₂-x₁)² + (y₂-y₁)²]. Step 2: d = √[(4-0)² + (0-3)²] = √[16 + 9] = √25 = 5 units.