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Question

In figure, points X, Y, Z are the midpoints of side AB, side BC and side AC of ABC respectively. AB = 5 cm, AC = 9 cm and BC = 11 cm. Find the length of XY, YZ, XZ.

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Solution

Given AC = 9 cm
X and Y are the midpoints of side AB and BC.
The segment joining midpoints of any two sides of a triangle is parallel to the third side and half of it.
XY=12AC
XY=12×9=4.5 cm
Given AB = 5 cm
Z and Y are the midpoints of side AC and BC.
The segment joining midpoints of any two sides of a triangle is parallel to the third side and half of it.
YZ=12AB
YZ=12×5=2.5 cm
Given BC = 11 cm
Z and X are the midpoints of side AC and AB.
The segment joining midpoints of any two sides of a triangle is parallel to the third side and half of it.
XZ=12BC
XZ=12×11=5.5 cm
Hence the measures of XY, YZ and XZ are 4.5 cm, 2.5 cm and 5.5 cm.

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