Transcript 10.3 – Measures of the Angles of Triangles

10.3 – Measures of the Angles
of Triangles
Obj: to solve problems related to
the angles of a triangle
** Sum of all angles add up to 180 **
A
x
y
z
2
1
B
If A is B then what is
M<1=M<y
M<2=M<x
Right triangles 1
M<1 + M <2 = 90
2
Exterior angles2
Exterior angle
1
3
x
M<3 + m<x=180
M<1 + m<2 + m<3 =180
M<x =m<1 +m<2
Isosoles triangle2 sides are equal
2 equal legs (sides)
Legs
Base angle
2 equal base angles