13.3 Calculating angles_1allr

Which angle's size is
between 90° and 180°?
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Slide 1: Question ouverte
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Cette leçon contient 16 diapositives, avec quiz interactifs et diapositives de texte.

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Which angle's size is
between 90° and 180°?

Slide 1 - Question ouverte

Types of angles
Acute angle: between 0° and 90°
Right angle: 90°
Obtuse angle: between 90° and 180°
Straight angle: 180°
Reflex angle: between 180° and 360°
Full angle: 360°
(A full angle is also called a full turn)

Slide 2 - Diapositive

Both a straight angle and a full turn look like a straight line. The arc is used to show it is an angle.

Slide 3 - Diapositive

Calculating angles

Slide 4 - Diapositive

Opposite angles
Opposite angles are the angles on opposite sides of the point of intersection of two lines. Opposite angles are always equal.

Slide 5 - Diapositive

Calculating angles
What type of angle is            ?

A4

Slide 6 - Diapositive

What type of angle is angle A4?
A
Acute angle
B
Right angle
C
Obtuse angle
D
Straight angle

Slide 7 - Quiz

Calculating angles
Which angle is the opposite
angle of             ?

A1

Slide 8 - Diapositive

Which angle is the opposite of angle A1?
A
A2
B
A3
C
A4
D
A5

Slide 9 - Quiz

Calculating angles
What size is             ?

A2

Slide 10 - Diapositive

How many degrees
is angle A2?

Slide 11 - Question ouverte

Calculating angles

(because they are opposite angles)


(because it is a right angle)

A3=A1=57°
A4=90°

Slide 12 - Diapositive

Calculating angles
                        and            are together
a ......
A1,A5
A4

Slide 13 - Diapositive

Angle A1, angle A5 and
Angle A4 are together a ....
A
full turn
B
reflex angle
C
straight angle
D
right angle

Slide 14 - Quiz

Calculating angles
A5=1809057=33°

Slide 15 - Diapositive

Weektask

Slide 16 - Diapositive