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Angles. What is to be learned?. How to identify types of angles How to name angles How to measure and draw angles. What is an angle?. Arms. Measuring Angles. We use degrees. Vertex. Types of Angle. Right Angle. 90 degrees. 90 0. Less than 90 0. Acute Angle. Straight Angle. 180 0.

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Presentation Transcript

What is to be learned
What is to be learned?

  • How to identify types of angles

  • How to name angles

  • How to measure and draw angles


What is an angle?

Arms

Measuring Angles

We use degrees

Vertex


Types of Angle

Right Angle

90 degrees

900

Less than 900

Acute Angle


Straight Angle

1800

Obtuse Angle

More than 900

and less than 1800


Straight Angle

1800

Obtuse Angle

More than 900

and less than 1800


Straight Angle

1800

Reflex Angle

More than 1800

and less than 3600


Complete Turn

3600

These are Types of Angles

Not the names


Obtuse

Acute

Reflex


1340

Obtuse

370

Acute

1800

Straight

2780

Reflex

900

Right


Pair Same Type of Angle

2560

930

Reflex

Obtuse

900

720

Acute

3600

1370

1810

240


Naming Angles

R

H

T

LTHR

or LRHT

vertex is always in the middle


M

LMYG or LGYM

Y

G

T

LTAB or LBAT

A

B


D

Y

K

E

LDEK or LKED


LWUK or LKUW

U

W

K

F

B


Measuring Angles

Zero

Always have an estimate in your mind


1

2

4

3


Drawing Angles

400

Zero


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