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The midpoints of two sides of a triangle are joined by a straight line. What is true of that line?
AParallel to the third side
BEqual to the third side
CAt right angles to one side
DTwice as long as one side
Answer & Solution
Correct answer: A. Parallel to the third side
1. The two chosen points sit exactly halfway along their sides.
2. The line joining them runs parallel to the remaining side of the triangle.
3. It is also exactly half as long as that remaining side.
4. Those two facts together make up the mid-point theorem.
_Source: Siyavula Mathematics Grade 12 (Everything Maths, CC BY 4.0), Chapter 8: Euclidean geometry_