Answer:
Step-by-step explanation:
It is clear that the wall makes a right angle with the ground. Therefore, we can apply Pythagoras theorem to get its sides.
Hypotenuse ^2= altitude^2+ base^2
altitude ^2=hypotenuse^2-base^2
=13^2-5^2
=144
Altitude/the point where the ladder meets the wall = 12.(√144)
