Triangles

Triangles

1. Angles

   • Acute
   • Right Angle
   • Obtuse

2. Types

   • Saclene
   • Isoseles
   • Equalatural

3. Triangle angle sum

   • angles add up to 180 degrees
   • Right angles are 90 degrees
   • Acute angles are less than 90 degress
   • Obtuse angles are greater than 90 degrees
   • a strait angle is 180 degrees

4. congruence

   • notes are on paper
   • Congruent means they are the same

5. SSS and SAS, AAS, ASA

   • SSS=side side side
   • SAS=side angle side
   • When you look to see if a triangle congruent
   • AAS=angle angle side
   • ASA=angle side angle

6. Right triangle congruency

   • If the hypotenuse and one leg of a right triangle are equal to the hypotenuse and one leg of another right triangle, then the two right triangles are congruent.

7. Exterior Angles

   • States that the measure of an exterior angle of a triangle is greater than either of the measures of the remote interior angles.

8. Base angles congruent (isosceles)

   • If you have an isosceles triangle, a triangle where 2 of the sides are congruent then the angles oppisite of them are congruent.

9. Triangle Mid-Segment Theorem

   • A segment joining the midpoints of 2 sides of a triangle

10. Side splitter theorem

    • if a line is parallel to a side of a triangle and intersect the other two sides, then this line divides those two sides proportionally.
    • ex 2/4 = x/7 (make a proportion) solve it for x 4x= (2)(7) 4x=14 x=3.5(answer)