Use a protractor to measure angles

One unit of measurement of an angle is the degree

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The symbol for degree is a small raised circle, °

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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

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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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

∠ 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 ____________

Missing

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Classifying angles

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

(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

∠

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

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

∠ 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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POINTS (1)

One unit of measurement of an angle is the degree

Correct Answer

Explanation

The symbol for degree is a small raised circle, °

Correct Answer

Explanation

An angle measure of 1° reads as

Correct Answer

Explanation

An angle measure of 1° meaning

Correct Answer

Explanation

Angle reading symbols

Correct Answer

Explanation

An angle measure equivalency

Correct Answer

Explanation

Match angles to the diagrams

Correct Answer

Explanation

We can use a _________ to measure angles

Correct Answer

Explanation

Write the correct measure of angles in the below table

Correct Answer

Explanation

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

Correct Answer

Explanation

Classifying angles

Correct Answer

Explanation

Match angles with diagrams

Correct Answer

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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Explanation

Classify the following angles

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Explanation

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