Anglesandtriangles
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The document defines different types of angles and triangles. It explains that an angle is formed by two rays sharing a common endpoint, and can be acute (between 0 and 90 degrees), right (90 degrees), or obtuse (between 90 and 180 degrees). A straight angle measures 180 degrees. Triangles can be equilateral (three equal sides and angles), isosceles (two equal sides), right (one 90 degree angle), scalene (no equal sides), and the interior angles of any triangle always sum to 180 degrees. Examples of each type of angle and triangle are provided.
Anglesandtriangles
- 2. UDAYA COLLEGE OF EDUCATION UDAYA NAGER AMMANDIVILAI
- 4. NAME BITIYA SUBJECT ROLL NO : A AMMU : MATHEMATICS :
- 6. Angles A shape formed by two rays sharing a common endpoint; contains two rays and a vertex vertex—point common to two rays of a triangle or two sides of a polygon ray vertex ray—has one endpoint and goes infinitely in one direction ray
- 7. Types of Angles Acute angle: An angle whose measure is greater than zero degrees and less than 90 degrees
- 9. Types of Angles Right angle: Angle that measures 90 degrees Example:
- 10. Types of Angles Obtuse angle: One angle measures greater than 90 degrees and less than 180 degrees Example :
- 11. Straight Angle Straight angle: A line that goes infinitely in both directions and measures 180 degrees
- 12. Types of Triangles Equilateral triangle: A triangle with three congruent (equal) sides and three equal angles These marks indicate equality.
- 13. Types of Triangles Isosceles triangle: A triangle with at least two congruent (equal) sides
- 14. Types of Triangles Right triangle: Has only one right angle (90 degrees) This box indicates a right angle or a 90-degree angle.
- 15. Types of Triangles Scalene triangle: A triangle that has no congruent (equal) sides
- 16. Types of Triangles Name each type of triangle Right 4 2 Scalene 1 3 Equilateral Isosceles
- 17. Interior Angles Interior angles: An interior angle (or internal angle) is an angle formed by two sides of a simple polygon that share an endpoint Interior angles of a triangle always equal 180 degrees.