Answer:
⏃ rational number can be expressed as ⏃ number that can be written in the form of ⏃ fracton.
77° + 90° + x° = 180°
x° = 180° -77° -90°
x° = 13°
1. 4/4
2. 4
3. 4-4/4
4. 4*4/4
5. 4+4/4