Download geom Section 3.5 Parallel Lines and Triangles.notebook

geom Section 3.5 Parallel Lines and Triangles.notebook
October 24, 2016
10/24/16 ­ Warm Up Problem
Graph the lines of the following equations.
y = 2x + 1
y + 4 = ­(x +2)
Sep 20­12:09 PM
1
geom Section 3.5 Parallel Lines and Triangles.notebook
October 24, 2016
Section 3.5 Parallel Lines and Triangles Goal: classify triangles using angles and sides
calculate the measures of angles of triangles
Acute Triangle
Obtuse Triangle
all three angles are acute
one angle is obtuse
Right Triangle
Equiangular Triangle
one angle is a right angle
an acute triangle with all three angles congruent
Sep 20­12:10 PM
2
geom Section 3.5 Parallel Lines and Triangles.notebook
October 24, 2016
Classify the following triangles as acute, obtuse, or right.
Sep 29­7:51 PM
3
geom Section 3.5 Parallel Lines and Triangles.notebook
October 24, 2016
Side Classifications
Scalene
no sides of the triangle are congruent
Isosceles
at least two sides of the triangle are congruent
Equilateral
all three sides of the triangle are congruent
Sep 29­7:40 PM
4
geom Section 3.5 Parallel Lines and Triangles.notebook
October 24, 2016
Classify the following triangles as scalene, isosceles, or equilateral.
Sep 29­7:55 PM
5
geom Section 3.5 Parallel Lines and Triangles.notebook
October 24, 2016
Theorem 3.11 Triangle Sum Theorem
The sum of the measures of the angles of a triangle is 180
Oct 4­9:38 PM
6
geom Section 3.5 Parallel Lines and Triangles.notebook
October 24, 2016
Find the measure of each missing angle.
40
72
31
25
58
Oct 19­1:26 PM
7
geom Section 3.5 Parallel Lines and Triangles.notebook
October 24, 2016
Find the measure of each numbered angle.
Oct 4­9:44 PM
8