

Unit 2 Vocabulary
Isosceles Triangle: A triangle with a least two congruent sides.
Angle Sum Theorem: The sum of the interior angles of a triangle is 180 degrees.
Isosceles Triangle Theorem: If two sides of a triangle are congruent, then the angles opposite those sides are congruent.
Obtuse Triangle: A triangle that has an obtuse angle as one of the interior angles.
Equiangular Triangle: A triangle with 3 congruent angles.
Acute Triangle: A triangle with 3 acute interior angles.
Scalene Triangle: A triangle in which all 3 sides have different lengths.
Right Triangle: A triangle which has a right, 90 degrees, interior angle.
Equilateral Triangle: A triangle with which all three sides are of equal length.
Supplementary Angles/ Linear Pair: Two angles that add up to 180 degrees.
Vertical Angles: Angles opposite one another at the intersection of two lines. Vertical angles are congruent
Midsegment: A segment connecting the midpoints of two sides of a triangle.
Midsegment Theorem: In a triangle, the segment joining the midpoints of any two sides will be parallel to the third side and half its length
Congruent Figures: Figures exactly equal in size and shape.