Solution
To find the angle m∠p.
Method of proof
In triangle ΔDAB, which is a right triangle
Applying the Pythagorean theorem gives us
Hypotenuse² = Perpendicular² + Base²
DB² = AB² + AD²
Where AB = 5 units
AD = 6 units
Substituting in the formula outcomes in
DB² = 5² + 6²
= 25 + 36
= 61

= approximately 7.8 units
The triangle ΔDCB is also right-angled.
Using the trigonometric identity here.


Given that DC = 4 units and DB ≈ 7.8 units,
Substituting these values into the trigonometric identity gives us.


Thus, we find that ∠p ≈ 59.15 °