| A | 20° |
| B | 30° |
| C | 35° |
| D | 40° |
| A | 5cm |
| B | 4cm |
| C | 3cm |
| D | 2cm |
| A | 116° |
| B | 117° |
| C | 118° |
| D | 119° |
| A | |
| B | 4 |
| C | |
| D | 5 |
| A | ∠EAB=∠FAC |
| B | BC=EF |
| C | ∠BAC=∠CAF |
| D | ∠AFE=∠ACB |