Measuring Angles with Protractors

This video tutorial on the TechMath channel covers the basics of measuring angles. It begins with an introduction to angles, including the concepts of vertex and intersection. The tutorial then explains how to use a protractor to measure angles, detailing the different types of angles such as right, acute, obtuse, and reflex angles. The video also provides practical tips on measuring and constructing angles, ensuring viewers understand the complete rotation of angles and the significance of 360 degrees in a circle.

What is the tool used for measuring angles?

• Divider

• Protractor

• Compass

• Ruler

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CCSS.4.MD.C.6

What type of angle measures exactly 90 degrees?

• Straight angle

• Obtuse angle

• Right angle

• Acute angle

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CCSS.4.G.A.1

Which angle is defined by a measurement of 180 degrees?

• Right angle

• Straight angle

• Reflex angle

• Acute angle

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CCSS.4.G.A.1

What is the range of degrees for an acute angle?

• 271 to 360 degrees

• 181 to 270 degrees

• 91 to 180 degrees

• 0 to 90 degrees

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CCSS.4.G.A.1

Which angle is formed when the arms of the angle point in exactly opposite directions?

• Reflex angle

• Straight angle

• Right angle

• Acute angle

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CCSS.4.G.A.1

What type of angle measures more than 180 degrees but less than 360 degrees?

• Acute angle

• Reflex angle

• Right angle

• Straight angle

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CCSS.4.G.A.1

How many degrees are there in a full circle?

• 90 degrees

• 360 degrees

• 180 degrees

• 270 degrees

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CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

What should align with the zero mark on a protractor when measuring an angle?

• The vertex

• None of the above

• The longest arm

• The shortest arm

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CCSS.4.MD.C.6

What common mistake should be avoided when reading a protractor?

• Reading the wrong scale

• All of the above

• Ignoring the smaller scale

• Measuring from 100 degrees

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CCSS.4.MD.C.6

What is the first step in constructing an angle using a protractor?

• Labeling the angle

• Drawing the arms

• Aligning the protractor

• Drawing the baseline

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CCSS.4.MD.C.6