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# G.2 teacher types of triangle and angles of triangles

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### G.2 teacher types of triangle and angles of triangles

1. 1. Types of Triangle and Angles of Triangles Classification and Properties
2. 2. Types of Triangles <ul><li>Classification by Angles: </li></ul><ul><li> Right Triangle- the largest angle in the triangle is EXACTLY 90  </li></ul><ul><li>Acute Triangle- the largest angle in the triangle is less than 90  </li></ul><ul><li>Obtuse triangle- </li></ul><ul><li>the largest angle in the triangle </li></ul><ul><li>is greater than 90  </li></ul><ul><li>Equiangular Triangle- </li></ul><ul><li>All three angles are congruent </li></ul>
3. 3. Types of Triangles <ul><li>Classification by Sides: </li></ul><ul><li>Scalene Triangle : No sides have equal measure </li></ul><ul><li>Isosceles Triangle : </li></ul><ul><li>At least two sides have equal </li></ul><ul><li>measure </li></ul><ul><li>Equilateral Triangle : </li></ul><ul><li>All three sides have equal </li></ul><ul><li>measure </li></ul>
4. 4. Theorem Example: 80  60  140  x 
5. 5. Isosceles Triangle Theorem Example: 54  x 
6. 6. Homework Examples: (6y  20)° (8y + 6)° 8y°
7. 7. Homework Examples (5x  8)° (4x + 20)°
8. 8. Homework Examples: y° (4y  22)° 60°
9. 9. Homework Examples: 132° (3x + 2)° (2x  7)°
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