5.3 congruent triangles to the rescue! - ms. hansen · 2.5 congruent triangles to the rescue a...
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Warm
up is #1-2 of the “Ready” on pg.27
Warm Up
Unit 5 - Triangle CongruenceLesson 5.3 Congruent Triangles to the
rescue!
*Quiz tom
orrow*
Previous learning?
Objectives
-U
se the definition of congruence in terms of rigid
motions to show that two triangles are congruent if
and only if corresponding pairs of sides and corresponding pairs of angles are congruent.
-Explain how the criteria for triangle congruence (A
SA, SA
S, and SSS) follow from the definition of
congruence in terms of rigid m
otions.
Definition
Isosceles triangle: A triangle with at least two
congruent sides.
Definition
Isosceles triangle theorem: If two sides of a
triangle are congruent, then the angles opposite those sides are congruent.
Got it?
Homew
ork5.3 H
omework - Finish up the “Ready,
Set,” #3-9 on pages 27-29 of 2.5
Congruent Triangles to the Rescue
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