Download Triangles (part 2)

Triangles (part 2)
When the sides of a triangle are extended . . .
Exterior angles—the angles that form a linear pair with the interior angles
Exterior Angle Theorem
The measure of an exterior angle of a triangle is equal
to the sum of the measures of the two nonadjacent
interior angles.
B
1
A
C
Find the value of x. Then find the measure of the exterior angle shown.
8 x°
38°
1
Triangles (part 2)
Find the value of x. Then find the measure of the exterior angle shown.
(3x + 15)°
(6x – 10)°
(8x + 18)°
2