Divide the circle into four equal parts. Each part represents a right angle of 90°. Together, the four right angles add up to 360°, which is one full turn or a complete circle. class 5 Maths-Mela Mathematics Textbook Chapter 3 Angles ...
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An acute angle is smaller than 90°. An obtuse angle is larger than 90° but less than 180°. A right angle is exactly 90°. All three can be drawn easily with lines from the same point. Class 5 NCERT Maths-Mela Chapter ...
A three-quarter turn is shown by dividing a circle into four equal parts. Mark three parts from the starting point. The ending point after three divisions represents a 270° angle, which is a reflex angle. Class 5 NCERT Maths-Mela Chapter 3 ...
Two quarter turns equal a half turn or 180°. Three-eighth turns equal 135°. Therefore, two quarter turns (180°) are bigger than three-eighth turns (135°). A straight angle is larger than a partially completed turn. Class 5 Mathematics Maths-Mela Angles as Turns Class ...
A right angle measures exactly 90°, like a square corner. An acute angle measures less than 90°, looking sharp and narrow. An obtuse angle measures more than 90° but less than 180°, appearing wider than a right angle. Class 5 Mathematics ...