Final answer:
The statement about dip and strike being perpendicular to each other is true. The dip is the angle of inclination of a rock layer, while the strike is the direction along the horizontal plane, and they form a 90° angle to each other.
Step-by-step explanation:
The statement 'Dip and strike are perpendicular to each other' is true. In geological terms, the dip is the angle at which a rock layer or surface inclines from the horizontal. The strike is the direction of the line formed by the intersection of a rock surface with a horizontal plane, which is perpendicular to the dip direction. When using the right-hand rule in geological fieldwork, if your fingers point towards the direction of the dip, then your extended thumb will point in the direction of the strike. According to the right-hand rule, the strike is always 90° counterclockwise to the dip direction, confirming that they are indeed perpendicular to each other.