Midpoint and Distance Algebra C and C

Describe and correct the error a student made in finding the midpoint of CD with ​C(−​4,5) and ​D(−​1,−​4).

• The student used incorrect coordinates when calculating the midpoint.

• The student did not divide the numerator and denominator by 2 when calculating the midpoint.

• The student swapped the​ x- and​ y-values when calculating the midpoint.

• The student did not add the​ x- and​ y-coordinates when calculating the midpoint.

The coordinates of point T are ​(0​,2​).

The midpoint of ST is ​(1​,−3​).

Find the coordinates of point S.

(Type an ordered pair)

Find the midpoint of the segment with the endpoints:(4, 12) and (-6, 14)

Find the midpoint of the segment with the endpoints:(-7, -8) and (4, 7)  

• (-5.5, -7.5)
• (-1.5, -0.5)
• (-3, -1)
• (0.5, 1.5)

Find the missing endpoint given the midpoint (3,4) and the other endpoint (-1,6)

Find the endpoint of the segment with one endpoint of (-4, 5) and midpoint of (7, -9).

• (18, -23)

• (13, 18)

• (11,4)

• (1.5, -2)

If point S is the midpoint of segment RT, what conclusion can you make?

• 
• 
• 
• It is not possible to make a conclusion from the given information.

Find the value of x.

• 15

• 30

• 10

• not enough information