6 4 inequalities in one triangle
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Inequalities in Triangles
6-4 Inequalities in One Triangle
If one side of a triangle is longer than a second side, then the angle opposite the first side is larger than the angle opposite the second side.
Theorem 6-2
Answers: smallest is Z; largest is Y
If one angle of a triangle is larger than a second angle, then the side opposite the first angle is longer than the side opposite the second angle.
Name the longest side and the shortest side.
Theorem 6-3
Answers: longest; shortest is
Corollary 1◦ The perpendicular segment from a point to a line
is the shortest segment from the point to the line.
Corollary 2◦ The perpendicular segment from a point to a
plane is the shortest segment from the point to the plane.
The sum of the lengths of any two sides of a triangle is greater than the length of the third side.
Is it possible for a triangle to have sides with lengths 9, 6, and 2?
Two sides of a triangle have lengths 8 and 12. The length of the third side can be any number between _____ and _____.
Theorem 6-4 The Triangle Inequality
Answers: no; 4 and 20
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