Respuesta :

Answer:

Hence, the supplement of a 20˚ angle is a 160˚ angle. This can be proven again, since 20+160=180 , and supplementary angles have a sum of 180˚ .

Step-by-step explanation:

The answer is: ∠BOA

(Had the same question)

BTW, you forgot to add the picture.  That's why no one understands this, unless they had this question in their school work.