1. Exercise 6B Q.10(b)
Angle between ABC and DBC

2. Exercise 6B Q.10(b)
Angle between ABC and DBC
What’s the line of intersection?

3. Exercise 6B Q.10(b)
Angle between ABC and DBC
What’s the line of intersection? BC

4. Exercise 6B Q.10(b)
Angle between ABC and DBC
What’s the line of intersection? BC

5. Exercise 6B Q.10(b)
Angle between ABC and DBC
What’s the line of intersection? BC B C

6. Exercise 6B Q.10(b)
Angle between ABC and DBC
What’s the plane ABC? B C

7. Exercise 6B Q.10(b)
Angle between ABC and DBC A
What’s the plane ABC?
Isosceles Triangle B C

8. Exercise 6B Q.10(b)
Angle between ABC and DBC A
What’s the plane DBC? B C

9. Exercise 6B Q.10(b)
Angle between ABC and DBC A
What’s the plane DBC?
Isosceles Triangle B C D

10. Exercise 6B Q.10(b)
Angle between ABC and DBC A
Find a line perpendicular to the line of intersection BC. B C D

11. Exercise 6B Q.10(b)
Angle between ABC and DBC A
Find a line perpendicular to the line of intersection BC. B C D

12. Exercise 6B Q.10(b)
Angle between ABC and DBC A
Find a line perpendicular to the line of intersection BC. X B C D

13. Exercise 6B Q.10(b)
Angle between ABC and DBC A
∠AMD M B C D