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Angle Relationships. 90 degree angle:. 180 degree angle:. 90 and 180 degree angles……. Acute – angles less than 90 degrees. Right – angles with exactly 90 degrees. Types of angles……. Obtuse – angles greater than 90 degrees but less than 180 degrees.

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Presentation Transcript
types of angles
Acute – angles less than 90 degrees.

Right – angles with exactly 90 degrees.

Types of angles……
slide4
Obtuse – angles greater than 90 degrees but less than 180 degrees.

Straight – angles that are 180 degrees and form a line.

identify these angles
A.

B.

C.

D.

A. Obtuse

B. Right

C. Acute

D. Straight

Identify these angles…..
adjacent angles
Adjacent Angles……
  • Two angles that share a common side are adjacent angles.
  • Example:
non adjacent angles
Non-adjacent Angles……
  • Angles that do not share a common side are non-adjacent angles.
  • Example:
supplementary
Supplementary
  • Two angles whose sum is 180.
complementary
Complementary
  • Two angles whose sum is 90.
perpendicular
If 2 segments are perpendicular to each other, then they form a 90 degree angle.

The symbol for perpendicular is an upside down T.

Example:

Perpendicular
vertical angles
Vertical Angles are two non-adjacent angles formed by intersecting lines.

Vertical Angles are congruent. (Equal)

Vertical Angles……
linear pairs
Linear Pairs

Linear Pair – a pair of adjacent angles whose non-common sides form opposite rays.

1

2

∠1and ∠2form a linear pair.

homework
Homework
  • Angle Relationships Worksheet
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