Measuring Angles in 4th Grade Math

The video tutorial covers the concept of measuring angles for fourth-grade students, focusing on Texas standard 4.7c. It uses a problem from the 2021 released STAAR test to demonstrate how to measure angles with a protractor. The tutorial explains the types of angles: acute, right, and obtuse, and guides students through solving the problem by measuring angles and eliminating incorrect options. The solution is found by calculating the correct angle measurement, emphasizing the use of a protractor and understanding angle types.

What tool is used to measure angles?

• Scale

• Compass

• Protractor

• Ruler

What type of angle measures exactly 90 degrees?

• Obtuse

• Straight

• Acute

• Right

Which angle is less than 90 degrees?

• Straight

• Right

• Obtuse

• Acute

What is the degree measure that defines an obtuse angle?

• Less than 90

• More than 90

• 180

• Exactly 90

In the example, which angle was incorrectly identified as 45 degrees initially?

• Angle B

• Angle C

• Angle A

• Angle D

How do you calculate the angle measurement when the protractor does not start at zero?

• Add the numbers

• Divide the numbers

• Multiply the numbers

• Subtract the smaller from the larger

Which angle type is angle C classified as?

• Right

• Acute

• Obtuse

• Straight

What is the measurement of angle D?

• 180 degrees

• 45 degrees

• 135 degrees

• 90 degrees

What is the correct measurement of angle A as identified in the video?

• 13 degrees

• 85 degrees

• 90 degrees

• 45 degrees

Which angle was finally confirmed to measure 45 degrees?

• Angle A

• Angle C

• Angle B

• Angle D