For the quadrilateral MNPQ, the length of MQ is 11 units.
Option C is the correct answer.
What is a Quadrilateral?
A quadrilateral can be defined as a shape that has four sides and four angles.
For the given quadrilateral, MN = 10, NP = 3, QP = 6 and [tex]\angle PQM = 90 ^\circ[/tex].
Let us consider a point L on the line MQ, as shown in the attachment. Then LQ = 3, LN= 6 and [tex]\angle NLM = 90^\circ[/tex].
Applying the Pythagoras theorem in the triangle LMN.
[tex](MN)^2 = (LN)^2 + (LM)^2[/tex]
[tex]10^2 = 6^2 + (LM)^2[/tex]
[tex]LM = \sqrt{ 100 -36}[/tex]
[tex]LM = 8[/tex]
The length of MQ can be calculated as given below.
MQ = LM + LQ
MQ = 8 + 3
MQ = 11 units.
Hence we can conclude that the length of MQ is 11 units. Option C is the correct answer.
To know more about the Pythagoras theorem, follow the link given below.
https://brainly.com/question/10174253.