# Show obtuse and angle as opposed to straight

Classified in Mathematics

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** acute angle** is an

**angle**whose measure is greater than 0° and less than 90°

** acute triangle** is a triangle with 3 acute angles

** adjacent angles** are angles that have a common vertex and side, but no common
Interior points

** angle **is formed by two rays with a common endpoint called the vertex

** complementary
Angles** are angles
Whose measures add up to 90°

** congruent
Angles** are angles
That have the same measure

** equilateral
Triangle** is a triangle
With 3 congruent sides

** isosceles triangle
**is a triangle with at least 2
Congruent sides

** midpoint **is the point that divides a segment into two congruent segments

** obtuse angle** is an angle whose measure is greater than 90° and less than 180°

** obtuse triangle** is a triangle with an obtuse angle

** parallel lines** are lines in a plane that never meet

** perpendicular
Lines **are lines that
Intersect at 90° angles

** right angle** is an angle whose measure is 90°

** right triangle** is a triangle with a right angle

** scalene
Triangle **is a triangle
With no congruent sides

** straight angle** is an angle whose measure is 180°

** supplementary
Angles** are two angles
Whose measures add up to 180°

** transversal** is a line that intersects any two or more other lines

** Triangle
Inequality Theorem** - the sum of
The lengths of any two sides of a triangle is greater than the length of the
Third side

** Triangle Sum
Theorem** - the angle
Measures of a triangle add up to 180°

** vertical angles** are the nonadjacent angles formed by two intersecting lines