Topics
The Fish Tale
- The Fish Tale
- Properties of a Square
- Basic Concepts of Triangles
- Measurement of Length (CM, Meter, Kilometer)
- Measurement of Weight (Gram, Kilogram)
- Measurement of Height
- Measurement of Depth (Feet)
- Speed, Distance and Time
- Introducing a 5 Digit Number - 10,000
- Introducing the Six Digit Number - 1,00,000
- Introducing seven-digit numbers
- Crores
- Relation Between Money and Weight
- Calculation of Interest
- Basic Concepts of Profit and Loss
Math Magic
Shapes and Angles
How Many Squares?
Parts and Wholes
- Concept of Fraction
- Mathematical Patterns
- Patterns in Parts
- Comparing Fractions
- Addition of Fraction
- Subtraction of Fraction
- Multiplication of a Fraction by a Whole Number
- Using Operator 'Of' with Multiplication and Division
- Multiplication of Fraction
- Division of Fractions
- Concept of Reciprocals or Multiplicative Inverses
Does It Look the Same?
Be My Multiple, I'll Be Your Factor
Can You See the Pattern?
- Mathematical Patterns
- Patterns in Numbers
- Pattern in Letter
- Games with Numbers
Mapping Your Way
- Map
- Enlarging Or Reducing of Pictures and Maps
- Map of India
- Mapping Space Around Us
Boxes and Sketches
Tenths and Hundredths
- Understand Relationship Between Metre and Centimetre.
- Measurement of Length
- The Decimal Number System
- Concept of Place Value
- Using Decimal Number as Units
- Conversion of Units
- Decimal Place Value
Area and Its Boundary
- Concept of Perimeter
- Concept of Area
- Measurement of Length
- Measurement of Width
- Measuring the Length of a Curved Line
Smart Charts
Ways to Multiply and Divide
- Concept of Multiplication
- Application of Multiplication
- Concept of Area
- Concept of Division
- Application of Division
How Big? How Heavy?
- Concept of Volume
- Concept of Capacity
- Volume of Cube
- Mensuration of Cylinder
- Measurement of Weight
Definition
Right Angle: The right angle is exactly equal to 90°.
Straight Angle: A straight angle is equal to 180°.
Revolution: Turning by two straight angles (or four right angles) in the same direction makes a full turn. This one complete turn is called one revolution.
Complete Angle: The angle for one revolution is a complete angle. A complete angle is one complete revolution or equal to 360°.
Notes
Right, Straight, and Complete Angle by Direction and Clock:
Let us understand the concept of right and straight angles by directions.
When we move from North to East then it forms an angle of 90° which is called Right Angle.
When we move from North to South then it forms an angle of 180° which is called Straight Angle.
When we move four right angles in the same direction then we reach to the same position again i.e. if we make a clockwise turn from North to reach to North again then it forms an angle of 360° which is called a Complete Angle. This is called one revolution.
In a clock, there are two hands i.e. minute hand and hour hand, which moves clockwise in every minute. When the clock hand moves from one position to another then turns through an angle.
When a hand starts from 12 and reaches to 12 again then it is said to be completed a revolution.
Shaalaa.com | Right Angle, Straight Angle, Complete Angle & Reflex Angle Part-1
Series: Types of Angles - Right, Straight, Complete Angle, Zero Angle and Reflex Angle
00:16:42 undefined
00:07:33 undefined
00:07:46 undefined
00:06:21 undefined
00:08:36 undefined
00:04:50 undefined
00:13:07 undefined
00:06:04 undefined
00:03:32 undefined
00:04:57 undefined
00:14:40 undefined
Related QuestionsVIEW ALL [42]
Look at the angles in the pictures and fill the table.
| Angle | Right Angle | More than a right angle |
Less than a right angle |
 |
✓ | ||
 |
|||
 |
|||
 |
|||
 |
