A triangle whose angles are acute.
Altitude of a triangle
The perpendicular segment from a vertex to the line containing the opposite side of a triangle.
A ray that is in the interior of an angle and forms two equal angles with the sides of that angle.
Corresponding Parts of Congruent Triangles are Congruent.
A triangle whose sides are equal in length.
A triangle with two sides of equal length.
The segment connecting the vertex of an angle in a triangle to the midpoint of the side opposite it.
A triangle with one acute angle.
The bisector of a segment perpendicular to it.
A triangle that has a 90 degree angle.
A triangle with no equilateral sides.
A polygon with three sides.
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