Which of the following is not a characteristic of a plane?
it cannot be seen
it is imaginary
its width can be measured
it is infinite
none of the above

Answer : Its width can be measured

Explanation:

The width of a plane can be measured is not a characteristic of plane.

The properties of a plane include:

Option (3)

Explanation:

A plane generally refers to a two-dimensional line that helps in identifying a particular feature. It has no definite length. These are simply imaginary lines.

It does not have any specific length, breadth or height, so the width of a plane is impossible to measure.

These planes can be numerous in number and they can be oriented in a horizontal or vertical manner. Sometimes they are inclined too. But they can also be parallel to one another or it can be intersecting at one common point.

Thus, the correct answer is option (3).

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.