SAT Math : Lines

Study concepts, example questions & explanations for SAT Math

varsity tutors app store varsity tutors android store varsity tutors ibooks store

Example Questions

Example Question #2 : How To Find The Midpoint Of A Line Segment

Find the coordinates for the midpoint of the line segment that spans from (1, 1) to (11, 11).

Possible Answers:

(5, 6)

(6, 5) 

(5, 5)

(6, 6)

(7, 7) 

Correct answer:

(6, 6)

Explanation:

The correct answer is (6, 6). The midpoint formula is ((x+ x2)/2),((y+ y2)/2) So 1 + 11 = 12, and 12/2 = 6 for both the x and y coordinates.

Example Question #1 : How To Find The Midpoint Of A Line Segment

What is the midpoint between the points (–1, 2) and (3, –6)?

Possible Answers:

(1,2)

(3,1)

(1,–2)

(–1,2)

(–2,–1)

Correct answer:

(1,–2)

Explanation:

midpoint = ((x1 + x2)/2, (y1 + y2)/2)

             = ((–1 + 3)/2, (2 – 6)/2)

             = (2/2, –4/2)

             = (1,–2)

Example Question #1 : How To Find The Midpoint Of A Line Segment

A line segment connects the points (-1,4) and (3,16). What is the midpoint of this segment?

Possible Answers:

(-1,6)

(2,10)

(1,10)

(0,6)

(2,5)

Correct answer:

(1,10)

Explanation:

To solve this problem you will need to use the midpoint formula:

midpoint = (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2} )

Plug in the given values for the endpoints of the segment: (-1,4) and (3,16).

midpoint = (\frac{-1+3}{2},\frac{4+16}{2} ) = (\frac{2}{2}, \frac{20}{2}) = (1, 10)

Example Question #2 : How To Find The Midpoint Of A Line Segment

What is the midpoint between  and ?

Possible Answers:

Correct answer:

Explanation:

The midpoint is the point halfway between the two endpoints, so sum up the coordinates and divide by 2:

Example Question #3 : How To Find The Midpoint Of A Line Segment

 has endpoints  and

What is the midpoint of

Possible Answers:

Correct answer:

Explanation:

The midpoint is simply the point halfway between the x-coordinates and halfway between the y-coordinates: 

Sum the x-coordinates and divide by 2:

Sum the y-coordinates and divide by 2:

Therefore the midpoint is (5.5, 6.5).

 

 

Example Question #1 : How To Find The Midpoint Of A Line Segment

What is the mid point of a linear line segment that spans from  to ?

Possible Answers:

Correct answer:

Explanation:

To find the midpoint of a line segment, use this formula:

Therefore, the midpoint of the given line segment is:

Example Question #1 : How To Find The Midpoint Of A Line Segment

Find the midpoint of the line segment with endpoints (1,3) and (5,7).

Possible Answers:

Correct answer:

Explanation:

To solve, simply use the midpoint formula as outlined below.

Given,

Thus,

Example Question #2 : How To Find The Midpoint Of A Line Segment

Find the midpoint of a line segment with end points (1,3) and (11,3).

Possible Answers:

Correct answer:

Explanation:

To solve, simply realize you are on a horizantal line, so you just need to find the distance betweent he two x coordants and find half way between them. Thus,

Thus, the midpoint is at (1+5,3) which is (6,3).

Example Question #181 : Lines

What is the midpoint of a line segment that begins at (0, -1) and ends at (4, 10)? 

Possible Answers:

None of the given answers. 

Correct answer:

Explanation:

The midpoint of a line segment can be found by averaging the x-values and y-values of the given ordered pairs. In other words,

.

Take the average of the given x- and y-values of our ordered pairs.

Example Question #12 : Midpoint Formula

Find the midpoint between the point  and the center of the given circle.

Possible Answers:

None of the given answers

Correct answer:

Explanation:

Remember that the general equation for a circle with center  and radius  is 

With this in mind, the center of our circle is 

To find the midpoint between our two points, use the midpoint formula. 

Learning Tools by Varsity Tutors