October 10, 2016
Warm-Up:
Solve
Chapter 4
4.1 Exterior Angles and Triangle Sum
HW: p. 211 #1-7, 15, 18, 20, 34-37, 39,
49, 52, 53
October 10, 2016
POSTULATE: Given a line and a point off the line there is exactly
one line parallel to the given line
Prove: 3 interior angles of a ∆ add to 180˚
1
2
3
October 10, 2016
Vocab:
scalene ∆
isosceles ∆
equilateral ∆
acute ∆
right ∆
obtuse ∆
equiangular ∆
interior angles
exterior angles
auxiliary lines
corollary to a theorem
Exterior angle theorem: iPads
STATE it:
Draw it:
October 10, 2016