Vì số đo bốn góc bằng 180+180=360.

Ta có O1+O2+O3=325 độ. Nên số đo góc O4 là:

360-325=35

Question 1: Robots can work as the guards in important places.

Question 2: Ha Noi is a famous for its delicious street food.

Question 3: What type of house do you live in the future?

Question 4: Pack your lunch in a lunch box instead of a plastic bag.

Question 1: Robots can work as the guards in important places.

Question 2: Ha Noi is a famous for its delicious street food.

Question 3: What type of house do you live in the future?

Question 4: Pack your lunch in a lunch box instead of a plastic bag.