Question

In EFG iF angleE=40° and angleF=80°
then measure of exterior angle
of traingle at point I will be

option:
1)60degree
2)100degree
3)10degree
4)30degree​

Answer 1

Answer:

interior angle G=60, exterior angle EGI=120

Step-by-step explanation:

Angle Sum Property

^E+^F+^G=180

40+80+^G=180

120+^G=180

^G=180-120

^G=60

Exterior Angle Theorem

Sum of Interior Opposite Angle =Exterior Angle

^EFG+^FEG=^EGI

40+80=^EGI

120=^EGI

or

Linear Pair

^EGF+^EGI= 180

60+^EGI=180

^EGI=180-60

^EGI=120