Consider the Spheres Shown in the Figure

question 5

Multiple Choice

Consider the spheres shown in the figure. The sphere at the left shows two lines. In Euclidean geometry, we know that two lines are either parallel or cross at exactly one point. Discuss this property in relation to what you observe in the figure.

• A) Two lines intersect in two points.
• B) Two lines are either parallel or cross at exactly two points.
• C) Lines are great circles, and m is not a great circle.

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Definitions:

Pharynx

The muscular tube that extends from the back of the nasal cavities and mouth down to the esophagus and larynx, serving both respiratory and digestive functions.

Larynx

Also known as the voice box, it is the part of the respiratory tract involved in sound production, breathing, and protecting the trachea against food aspiration.

Nasopharynx

The upper part of the pharynx, connecting the nasal cavity above the soft palate to the oropharynx and laryngopharynx.

Tonsil

Small masses of lymphatic tissue located at the back of the throat that help in fighting off infections.