Answer:
AB = 17m
Step-by-step explanation:
The point at which a perpendicular line drawn from A touches the bottom line shld be labelled D.
So points A, B and D form a right angled triangle.
Distance DB will be 26m - 11m = 15m
AD = 8m
Using Pythagoras Theorem
AB² = DB² + AD²
= 15² + 8²
= 225 + 64
= 289
AB² = 289
Square root both sides
AB = 17 m
points A, B and C also form a right angled triangle
