Why do different liquids have different viscosities?

Because of the movement of the particles that make up each type of liquid.

Explanation:

here is more friction between the liquid particles in some liquids than in others. The viscosity of these liquids is higher.

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∠ BCA = 45°, ∠ AWD = 90°

Step-by-step explanation:

All angles are right angles by definition.

Diagonals bisect the angles , so

∠ BCA = 45°

Diagonals are perpendicular bisectors of each other, so

∠ AWD = 90°