Why the + or cross make 90 degree?

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Solution

This is because both lines are perpendicular to each other.

only cross like this " +" will give 90° degree angle.

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Why the + or cross make 90 degree?

This is because both lines are perpendicular to each other. only cross like this " +" will give 90° degree angle.

This is because both lines are perpendicular to each other.

only cross like this " +" will give 90° degree angle.