PARALLEL LINES AND THE TRANGLE

1
3-4

• PARALLEL LINES AND THE TRANGLE
• ANGLE-SUM THEOREM

2
TRIANGLE ANGLE-SUM TH

• THE SUM OF THE MEASURES OF THE ANGLES OF A
  TRIANGLE IS 180
• mltAmltBmltC180

B
A
C
3
CLASSIFYING TRIANGLES BY THEIR ANGLES

• EQUIANGULAR ALL ANGLES ARE
• ACUTE ALL ANGLES ARE ACUTE
• RIGHT HAS ONE RIGHT ANGLE
• OBTUSE HAS ONE OBTUSE ANGLE

4
CLASSIFYING TRIANGLES BY THEIR SIDES AND ANGLES

• EQUILATERAL ALL SIDES ANGLES
• ISOSCELES AT LEAST TWO SIDES
• SCALENE NO SIDES

5
EXTERIOR AND REMOTE INTERIOR ANGLES
EXTERIOR ANGLE
REMOTE INT ANGLE
REMOTE INT ANGLE
6
TRIANGLE EXTERIOR ANGLE THEOREM

• THE EXTERIOR ANGLE EQUALS THE SUM OF THE 2 REMOTE
  INTERIOR ANGLES

• mlt1mlt2mlt3

2
3
1