A circle is the set of all points in a plane at a certain distance, its radius, from a certain point, its center. Which of the following words in the definition is an undefined term used in geometry?
O point
radius
center
o distance

distance

Step-by-step explanation:

The rest of the words have actual accompanying definitions in geometry.

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

2x^2+5x+17

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