Understanding Angles and Protractors

The video tutorial introduces angles, explaining their visual representations and how they are measured in degrees. It covers right angles, which are 90 degrees and resemble an L shape, and obtuse angles, which range from 90 to 180 degrees. The tutorial also provides a step-by-step guide on using a protractor to measure angles accurately.

Which of the following shapes is similar to a right angle?

• A straight line

• A triangle

• A circle

• The letter L

Tags

CCSS.4.G.A.1

What is the degree measure of a right angle?

• 45 degrees

• 90 degrees

• 360 degrees

• 180 degrees

Tags

CCSS.4.G.A.1

An obtuse angle is best described as:

• More than 180 degrees

• Exactly 90 degrees

• Between 90 and 180 degrees

• Less than 90 degrees

Tags

CCSS.4.G.A.1

Which of the following is an example of an obtuse angle?

• A straight line

• The hands of a clock at 3:00

• The corner of a square

• The hands of a clock at 1:45

Tags

CCSS.4.MD.C.6

When using a protractor, where should you place the vertex of the angle?

• At the 180-degree mark

• At the hole in the center

• At the edge of the protractor

• At the 90-degree mark

Tags

CCSS.4.MD.C.6