SSAT Middle Level Math : How to find length of a line
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All SSAT Middle Level Math Resources
Example Questions
Example Question #1 : Lines
Figure NOT drawn to scale.
Evaluate 
By the Segment Addition Postulate,
Example Question #2 : Lines
A right triangle has one leg with a length of 6 feet and a hypotenuse of 10 feet. What is the length of the other leg?
In geometry, a right angle triangle can occur with the ratio of 
When you know the length of two sides of a right angle triangle like this, you can calculate the third side using this ratio.
Here, the ratio is:
This is double the 
Another way to solve is to use the Pythagorean Theorem: 
We know that one leg is 6 feet and the hypotenuse is 10 feet.
Example Question #3 : Lines
The radius of a circle is 6 inches. What is one-third of the diameter?
If the radius is equal to 6 inches, then the diameter will be double that value, or 12 inches. One-third of 12 is 4, which is therefore the correct answer.
Example Question #4 : Lines
A right triangle has one leg with length 
Since we are dealing with a right triangle, we can use the Pythagorean Theorem:
where 
Substituting values into the Theorem:
Example Question #2 : Lines
Line 
A line that is bisected is split into two segments of equal length. Therefore, if line 
Consequently, bisecting line segment 
Example Question #2 : How To Find Length Of A Line
Figure NOT drawn to scale.
Evaluate 
By the Segment Addition Postulate,
Example Question #3 : How To Find Length Of A Line
What is the length of a line segment with end points 
The length of a line segment can be determined using the distance formula:
Example Question #1 : How To Find Length Of A Line
What is the length of a line with endpoints 
To find the length of this line, you can subtract 
Example Question #182 : Plane Geometry
Find the length of the line segment whose endpoints are 
We can use the distance formula:
Example Question #2 : How To Find Length Of A Line
The point 
The radius is the distance from the center of the circle to anypoint on the circle. So we can use the distance formula in order to find the radius of the circle:
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