1. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU

2. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU
What’s the line of intersection?

3. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU
What’s the line of intersection? PQ

4. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU

5. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU Q P

6. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU
What’s the plane PQRS? Q P

7. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU
What’s the plane PQRS?
Rectangle Q R P S

8. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU
What’s the plane PQVU? Q R P S

9. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU
What’s the plane PQVU?
Rectangle V Q R U P S

10. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU
Find a line perpendicular to the line of intersection PQ. V Q R U P S

11. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU
Find a line perpendicular to the line of intersection PQ. V Q R U P S

12. Exercise 4.4 Q.5 (c)
Angle between PQRS and PQVU
∠VQR or ∠UPS V Q R U P S