2. Prove that if two straight line segments r and r'are parallel transports another straight line L, then they are also parallel transports along any other straight line passing through the midpoint of the segment of L between r and r'.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Problems 1-3 are on the plane
1. Given straight line segmentsr and r'are parallel transports along a straight line L. Prove that if you
extend segments r and r' as straight lines then they will never intersect. Prove this using the proof by
contraction technique and do not use the sum of interior angles equal to 180 degree.
2. Prove that if two straight line segments r and r' are parallel transports another straight line L, then they
are also parallel transports along any other straight line passing through the midpoint of the segment of L
between r and r'.
3. Prove that if two triangles have side-angle-angle (SAA) congruent then the two triangles are congruent.
Prove this using the proof by contradiction technique and do not use the sum of the interior angles equal
to 180.
4. Is SAA true for all triangles on the sphere? If yes, prove it. If no, give a counterexample and determine a
class of triangle (that is, a subset of all triangles on the sphere) for which SAA is true and explain why.
Submit a draft response to this question.
Transcribed Image Text:Problems 1-3 are on the plane 1. Given straight line segmentsr and r'are parallel transports along a straight line L. Prove that if you extend segments r and r' as straight lines then they will never intersect. Prove this using the proof by contraction technique and do not use the sum of interior angles equal to 180 degree. 2. Prove that if two straight line segments r and r' are parallel transports another straight line L, then they are also parallel transports along any other straight line passing through the midpoint of the segment of L between r and r'. 3. Prove that if two triangles have side-angle-angle (SAA) congruent then the two triangles are congruent. Prove this using the proof by contradiction technique and do not use the sum of the interior angles equal to 180. 4. Is SAA true for all triangles on the sphere? If yes, prove it. If no, give a counterexample and determine a class of triangle (that is, a subset of all triangles on the sphere) for which SAA is true and explain why. Submit a draft response to this question.
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