# Adjacent, Complementary and Supplementary Angles Video Lecture | Mathematics (Maths) Class 9

## Mathematics (Maths) Class 9

48 videos|378 docs|65 tests

## FAQs on Adjacent, Complementary and Supplementary Angles Video Lecture - Mathematics (Maths) Class 9

Adjacent angles are two angles that have a common vertex and a common side, but do not overlap. They are side by side and share a common ray. In other words, they are angles that are next to each other.
 2. How do we identify complementary angles?
Complementary angles are two angles that add up to 90 degrees. To identify complementary angles, you need to find two angles that, when added together, equal 90 degrees. For example, if one angle measures 35 degrees, the complementary angle would measure 55 degrees.
 3. What are supplementary angles?
Supplementary angles are two angles that add up to 180 degrees. These angles are often seen in a straight line, where the two angles are next to each other. If one angle measures 120 degrees, the supplementary angle would measure 60 degrees to complete the straight line.
 4. How can we determine if two angles are adjacent or not?
To determine if two angles are adjacent, you need to check if they share a common vertex and a common side. If the angles have these properties and do not overlap, then they are adjacent angles. If they do not share a common vertex or a common side, then they are not adjacent.
 5. Can two angles be both complementary and adjacent?
No, two angles cannot be both complementary and adjacent. Complementary angles add up to 90 degrees, whereas adjacent angles are side by side. If two angles are adjacent, their sum may or may not be 90 degrees, but they cannot be both complementary and adjacent at the same time.

## Mathematics (Maths) Class 9

48 videos|378 docs|65 tests

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