Step-by-step explanation:
57° + x + 23° = 180° { being linear pair }
80° + x = 180°
x = 180° - 80°
x = 100°
Hope it will help :)❤
Answer:
4.35
180-57=123
123-23=100
100 ÷ 23=4.347826
rounded to 4.35
