Provide the requested proof.Let ABC be a triangle, and let M be the midpoint of side 
. If 
is perpendicular to 
, prove that ABC is an isosceles triangle.
What will be an ideal response?
Answers will vary. A sample correct response would be as follows.
MB = MC, 
and clearly 
By SAS, 
, and so 
i.e. ABC is an isosceles triangle.
Mathematics
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