Answer:
Associative Property
Step-by-step explanation:
When the order of operands remains the same, all operations are identical (multiplication, or addition), and only the parentheses change places, the property involved is the <em>associative property</em>.
let the exterior angle be x
x=60°+80°(being one exterior angle is equal to two interior angle)
x°=140°
for what source
Refer to the picture that given
:))
