M is the midpoint of the line segment AB whose length is 26 cm. The length of line segment MB is ____.
X is the midpoint of the line segment PQ whose length is 26.7 cm. The length of line segment QX is :
Ram drew a line segment AB of length 3cm and another line segment CB of length 4cm, which is perpendicular to line segment AB. What is the length of the third side of the triangle?