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2 cards from this section. Quick, good the night before a test.
What is the main property of an isosceles triangle?
Think about equal lengths.
True or False: In an isosceles triangle, the angles opposite the equal sides are unequal.
Consider how isosceles triangles are defined.
In isosceles triangles, what can be said about the angles opposite the equal sides?
Think about what makes these triangles special.
True or False: The angles of a triangle sum to 180 degrees can be used in isosceles triangles.
Remember the triangle's angle sum property.
Prove that in triangle XYZ with XY = XZ and angle Y = angle Z, triangle XYZ is congruent to triangles formed by the bisector of angle X.
Draw the triangle and identify common segments.
Create an isosceles triangle and measure its sides and opposite angles, confirming the properties discussed in class.
Use a protractor to measure angles carefully.
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