[b]Definition:[/b][br][br]An [b][color=#c51414]ISOSCELES TRIANGLE[/color][/b] is a triangle that has [b][color=#c51414]AT LEAST 1 PAIR OF CONGRUENT SIDES[/color][/b]. [br][br][b]Directions:[/b][br][br]1) Click on the [color=#c51414]red checkbox[/color] to illustrate this definition. [br]2) Move any 1 (or more) of the vertices of this triangle around. Does it remain isosceles?[br]3) Click on checkbox 2. Move the vertices of the triangle around again. What do you notice about the base angles? [br][br][br]

[b]Questions: [/b][br][br]Fill in the following blanks (based upon your observations).  The words to complete these statements can be found in the [b]word bank[/b] below.  [br][br]1) If [color=#c51414]two sides of a triangle are congruent, then the _____________________ opposite those sides are ____________________[/color]. [br][br]2) The[color=#1551b5] ___________________ of the _________________ angle[/color] of an isosceles triangle is the ________________________ ________________ of the base (3rd side).[br][br][b]Word Bank:  [br][br]bisector   angles     congruent     perpendicular    vertex    bisector [/b]