TRIANGLES

TRIANGLES

1. LESSON 4-1

   • CLASSYFING BY ANGLES
     • angles
     • sides
     • acute
       • 3 acute angles
     • equiangular
       • 3 congruent acute angles
     • obtuse
       • 1 obtuse angle
     • right
       • 1 right angle
   • CLASSIFYING BY SIDES
     • Equilateral
       • 3 congruentemente sides
     • Isosceles
       • at least 2 congruentemente sides
     • Scalene
       • no congruente sides

2. LESSON 4-3

   • proving Triangles congruency
     • if 2 angles of one Triangles are congruente to the 2 angles of the other Triangles then the 3rd angle is congruente
   • congruence and corresponding parts
     • congruents when they have the same shape and size

3. LESSON 4-2

   • angle-sum theorem
     • the sum of the Measure of the angles - 180
   • Exterior angle theorem
     • The Measure of an exterior angle is equal to the sum of the measures of the two remote interior angles

4. LESSON 4-4

5. LESSON 4-5

6. LESSON 4-6

7. LESSON 4-7