الهندسة والقياس: الزاويتان المتتامتان

The video tutorial explains the concept of right angles, which are angles measuring 90 degrees. It introduces complementary angles, defined as two angles whose measures add up to 90 degrees. An example is provided where one angle measures 30 degrees, and the complementary angle is calculated as 60 degrees without using a protractor.

What is the measure of a right angle?

• 90 degrees

• 120 degrees

• 60 degrees

• 45 degrees

What is the sum of two complementary angles?

• 90 degrees

• 360 degrees

• 45 degrees

• 180 degrees

Which of the following pairs of angles are complementary?

• 60 degrees and 30 degrees

• 30 degrees and 60 degrees

• 90 degrees and 90 degrees

• 45 degrees and 45 degrees

If one angle measures 30 degrees, what is the measure of its complementary angle?

• 30 degrees

• 45 degrees

• 90 degrees

• 60 degrees

How can you find the measure of a complementary angle without a protractor?

• Divide the given angle by 2

• Multiply the given angle by 2

• Subtract the given angle from 90 degrees

• Add 90 degrees to the given angle