11. (D) 70°, 12. (A) 45°, 13. (A) 45°, 14. (B) 180°, 15. (C) 65°, 16. (D) 135°, 17. (A) 115°, 18. (D) 315°
Step-by-step explanation:
From the given diagram,
For, 11. DC
The angle for DC measured in diagram is 70°.
For, 12. AB
The angle for AB is measured in diagram is 45°.
For, 13. ED
The angle for ED is measured in diagram is 45°.
For, 14. ABD
The angle for ABD (AB+BD) is measured in diagram is 180°.
For, 15. BC
The angle for BC is measured in diagram is 65°.
For, 16. BD
The angle for BD is measured in diagram is 135°.
For, 17. CED
The angle for CED (CD + DE) is measured in diagram is 115°.
For, 18. ADB
The angle for ADB (AD+DB) is measured in diagram is 315°.
