In geometry, definitions are formed using known words or terms to describe a new word. There are three words in geometry that are not formally defined. These three undefined terms are point, line and plane.
<span>POINT (an undefined term) </span>
<span>In geometry, a point has no dimension (actual size). Even though we represent a point with a dot, the point has no length, width, or thickness. A point is usually named with a capital letter. In the coordinate plane, a point is named by an ordered pair, (x,y). </span>
<span>LINE (an undefined term) </span>
<span>In geometry, a line has no thickness but its length extends in one dimension and goes on forever in both directions. A line is depicted to be a straight line with two arrowheads indicating that the line extends without end in two directions. A line is named by a single lowercase written letter or by two points on the line with an arrow drawn above them. </span>
<span>PLANE (an undefined term) </span>
<span>In geometry, a plane has no thickness but extends indefinitely in all directions. Planes are usually represented by a shape that looks like a tabletop or wall. Even though the diagram of a plane has edges, you must remember that the plane has no boundaries. A plane is named by a single letter (plane m) or by three non-collinear points (plane ABC). </span>
<span>Undefined terms can be combined to define other terms. Noncollinear points, for example, are points that do not lie on the same line. A line segment is the portion of a line that includes two particular points and all points that lie between them, while a ray is the portion of a line that includes a particular point, called the end point, and all points extending infinitely to one side of the end point. </span>
<span>Defined terms can be combined with each other and with undefined terms to define still more terms. An angle, for example, is a combination of two different rays or line segments that share a single end point. Similarly, a triangle is composed of three noncollinear points and the line segments that lie between them. </span>
<span>Everything else builds on these and adds more information to this base. Those added things include all the theorems and other "defined" terms like parallelogram or acute angle. </span>
Step-by-step explanation:
the answer is the number 25
Answer:
390
Step-by-step explanation:
Answer:
C) 160
Step-by-step explanation:
Set up a proportion:
= ![\frac{x}{400}](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B400%7D)
Cross multiply and solve for x:
15x = 3600
x = 240
This means in 400 marbles, 240 are purple.
To find how many are not purple, subtract 240 from 400:
400 - 240
= 160 marbles
So, 160 marbles are not purple
Find the mean,median, and mode of the data set 12,23,17,20,14,14,18,16,17,18,18
oksian1 [2.3K]
Answer: The mean is 17, the median is 17, and the mode is 18.
Here's an explanation of how to find each.
Mean: When finding the mean, you must add together all the values, then divide by the total number of values stated. So, adding all the numbers together will give you 187. The divide by 11 (since there are 11 numbers) to get a mean of 17.
Median: When finding the median, simply put the numbers in numerical order, and find the the number in the direct middle. The numbers in numerical order are 12, 14, 14, 16, 17, 17, 18, 18, 18, 20, 23, making the median 17.
Mode: The mode is the number that shows up most often (most frequently). Since 18 shows up most (3 times) withing the data, it is the mode.
I hope this helps!