MATH 3rd

• angle came from the latin word "angulus" which means corner
• Parts of the angles are vertex, arms, initial side and terminal side
• Vertex is the corner points of an angle
• Arms are 2 sides of angle
• Initial side is known as reference line
• terminal side is the side or ray up to which the angle
• Types of angles are acute, straight, right, reflex, obtuse, full rotation
• Acute is 0 degree to 89 degree
• straight angle is exactly 180 degree
• Right angle is exactly 90 degree
• Reflex is 181 degree than 359 degree
• obtuse is 91 degree to 179 degree
• Angle pairs are that appears in twos to display certain geometrical properties
• Adjacent angles is shares a vertex and common side
• Complementary angles is 2 adjacent with measure that add up to 90 degree
• Non adjacent is 2 right angles that cannot complement each other
• Supplementary is 2 adjacent angles measure and add up to 180 degree
• Linear pair is 2 adjacent angle form a straight angle/ 180 degree
• Corresponding angles are 1 exterior, skip an angle and 1 interior
• vertical angle is pa ex na angles (1 interior and exterior)
• alternate interior and exterior are congruent
• Exterior and interior on the same side is supplementary
• Coresponding angles are congruent
• Vertical angles are congruent
• Linear pairs are supplementary
• Intersecting lines forms an X
• Perpendicular intersects with wach other at right angle
• Parallel lines has same plane, same direction but never intersect
• Theorem has ben proven true
• Postulates is a assumption that is accepted without proof
• Midpoint is point that divides the segment into 2 equal parts
• Bisector is line segment in 2 equal parts
• Triangles by sides are equilateral, isosceles and scalene
• Triangles by angles are equiangular, acute, right and obtuse
• Equilateral has 3 congruent
• Isosceles has 2 congruent
• Scalene has no congruent
• Equiangular has 3 congruent
• Acute has 3 acute angles
• Right has 1 right angle