Exploring Complementary and Supplementary Angles

This video tutorial for Class 7, Chapter 5, Part 1, covers the basic concepts of lines and angles, including line segments and rays. It explains different types of angles such as acute, right, obtuse, straight, and reflex angles. The video also delves into complementary and supplementary angles, providing definitions, examples, and problem-solving exercises. The tutorial concludes with a call to action for viewers to subscribe and stay updated.

What does it mean when a line has arrows on both ends?

• The line can be extended indefinitely on both sides.

• The line has fixed endpoints.

• The line cannot be extended.

• The line is curved.

Which of the following is NOT a correct representation of a line segment?

• AB with a line over it

• CD with a line segment over it

• EF with a ray over it

• GH with a line segment over it

What type of angle is formed when it is less than 90 degrees but more than 0 degrees?

• Right angle

• Obtuse angle

• Straight angle

• Acute angle

Which type of angle is exactly 180 degrees?

• Reflex angle

• Right angle

• Straight angle

• Acute angle

If two angles sum up to 90 degrees, what are they called?

• Supplementary angles

• Complementary angles

• Obtuse angles

• Right angles

What is the complement of a 50 degree angle?

• 50 degrees

• 90 degrees

• 140 degrees

• 40 degrees

If the difference between two complementary angles is 20 degrees, what are the measures of the angles?

• 50 degrees and 70 degrees

• 30 degrees and 60 degrees

• 45 degrees and 45 degrees

• 35 degrees and 55 degrees

What is the supplementary angle of 100 degrees?

• 180 degrees

• 90 degrees

• 100 degrees

• 80 degrees

Among two supplementary angles, if one angle is 70 degrees, what is the measure of the other angle?

• 100 degrees

• 130 degrees

• 110 degrees

• 120 degrees

If one angle is 44 degrees more than the other in a pair of supplementary angles, what are their measures?

• 58 degrees and 122 degrees

• 68 degrees and 112 degrees

• 62 degrees and 118 degrees

• 72 degrees and 108 degrees