Angle Relationships

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# Angle Relationships - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about ' Angle Relationships' - astrid

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Presentation Transcript

### Angle Relationships

Acute – angles less than 90 degrees.

Right – angles with exactly 90 degrees.

Types of angles……

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

A.

B.

C.

D.

A. Obtuse

B. Right

C. Acute

D. Straight

Identify these angles…..
• Two angles that share a common side are adjacent angles.
• Example:
• Angles that do not share a common side are non-adjacent angles.
• Example:
Supplementary
• Two angles whose sum is 180.
Complementary
• Two angles whose sum is 90.
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 are two non-adjacent angles formed by intersecting lines.

Vertical Angles are congruent. (Equal)

Vertical Angles……
Linear Pairs

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

1

2

∠1and ∠2form a linear pair.

Homework
• Angle Relationships Worksheet