Use a protractor to measure angles

One unit of measurement of an angle is the degree

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False

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The symbol for degree is a small raised circle, °

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False

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An angle measure of 1° reads as

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degree

one degree

null degree

dot degree

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An angle measure of 1° meaning

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An angle measure of 1° (read as “one degree”) means that one side of an angle is rotated ________ of a complete revolution about the vertex from the other side of the angle

\(\frac{1}{60}\)

\(\frac{1}{90}\)

\(\frac{1}{180}\)

\(\frac{1}{360}\)

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Angle reading symbols

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The measure of ∠ ABC , shown below, is 1°. We can write this in symbols as m(∠ ABC) = 1°

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An angle measure equivalency

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An angle measure of 90° is equivalent to (1)
An angle measure of 180° is equivalent to (2)
An angle measure of 270° is equivalent to (3)

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\(\frac{1}{4}\)

\(\frac{3}{4}\)

\(\frac{1}{2}\)

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Match angles to the diagrams

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(1)

(2)

(3)

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m(∠FED) = 270°

m(∠FED) = 180°

m(∠FED) = 90°

m(∠FED) = 360°

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We can use a _________ to measure angles

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ruler

protractor

compass

triangle

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Write the correct measure of angles in the below table

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∠ ABC = (1)°
∠ ABD = (2)°
∠ ABE = (3)°
∠ ABF = (4)°
∠ ABG = (5)°
∠ GBF = (6)°
∠ GBC = (7)°

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When two angles have the same measure, we say that they are ____________

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Missing

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Classifying angles

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Types of angles

(1): Angles whose measures are greater than 0° but less than 90°.
(2): Angles whose measures are 90°.
(3): Angles whose measures are greater than 90° but less than 180°.
(4): Angles whose measures are 180°

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Straight angles

Acute angles

Obtuse angles

Right angles

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Match angles with diagrams

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(1)

(2)

(3)

(4)

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Acute angle

Obtuse angle

straight angle

Right angle

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Right angle symbol

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Choose the symbol which is commonly drawn in a right angle

∠

Γ

>

<

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Classify each angle in the figure as an acute angle, a right angle, an obtuse angle, or a straight angle

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Since m(∠1) is an (1)angle.

Since m(∠2) is an (2) angle.

Since m(∠BDE) is a (3) angle.

Since m(∠ABC) is a (4) angle

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straight

acute

right

obtuse

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Classify the following angles

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∠ DEG is (1) angle
∠ DEF is (2) angle
∠ EFG is (3) angle
∠ EGF is (4) angle
∠ GEF is (5) angle

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obtuse

straight

acute

right

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One unit of measurement of an angle is the degree

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Explanation

The symbol for degree is a small raised circle, °

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Explanation

An angle measure of 1° reads as

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An angle measure of 1° meaning

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Explanation

Angle reading symbols

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Explanation

An angle measure equivalency

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Explanation

Match angles to the diagrams

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Explanation

We can use a _________ to measure angles

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Explanation

Write the correct measure of angles in the below table

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Explanation

When two angles have the same measure, we say that they are ____________

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Explanation

Classifying angles

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Explanation

Match angles with diagrams

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Explanation

Right angle symbol

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Explanation

Classify each angle in the figure as an acute angle, a right angle, an obtuse angle, or a straight angle

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Classify the following angles

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