Answer:
Explanation:
Draw a diagram of a vertical wall with a ladder leaned against it.
You can say that the ladder is 8 meters long and the distance from the bottom of the ladder to the base of the wall is 2 meters..
Then ask the question At what height on the wall is the top of the ladder?
This is calculated using the Pythagoras theorem - the ladder is the hypotenuse used of the right angled triangle formed by the wall, ladder and the ground.
8^2 = x^2 + 2^2 where x is the required height.
x^2 = 8^2 - 2^2
x^2 = 60
x = sqrt60
= 7.75 meters to nearest hundredth.