Mathematics, 31.05.2020 23:57 bella122805
In triangle ABC points M and N lie on sides AB and BC, respectively such that MN∥ AC . Segments AN and CM intersect at point K and AK = KC. Prove that △ABC is isosceles.
Answers: 2
1. Given
2. Given
3. Base angles theorem.
4. Alternate interior angles.
5. Alternate interior angles.
6. Isosceles triangle theorem.
7. Vertical angles.
8. By SAS postulate.
9. By CPCTC.
is isosceles 11. Base angles theorem.
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In triangle ABC points M and N lie on sides AB and BC, respectively such that MN∥ AC . Segments AN a...
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