PRESENTATION OUTLINE
Acute Angle
An angle that is less than 90 degrees
Obtuse Angle
An angle greater than 90 but less than 180.
Right Angles
A right angle is an angle that bisects the angle formed by two halves of a straight line. More precisely, if a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles.
Straight Angle
An angle that equal to exactly 180 degrees.
Vertical Angle
Angles that are diagonal to each other.
Adjacent Angle
Angles that are beside each other or in front of each other.
Complementary Angles
A pair of angles that equal to 90 degrees. (Both acute angles)
Supplementary Angles
A pair of angles that equal 180 degrees.
Corresponding Angles
Angles that are in the same position as one another.
Transversal
A line that intersects a system of lines.
Acute Triangle
A triangle that has all angles less than 90 degrees.
Obtuse Triangle
A triangle that has an angle greater than 90 degrees. Which only has one obtuse angle.
Scalene Triangle
A triangle that has three unequal sides.
Isosceles Triangle
A triangle that has two equal sides and one unequal side.
Equilateral Triangle
a triangle in which all three sides are equal. In traditional or Euclidean geometry, equilateral triangles are also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.
Right Triangle
is a triangle in which one angle is a right angle (that is, a 90-degree angle). The relation between the sides and angles of a right triangle is the basis for trigonometry.
