Question

A staircase 13m long is placed against a wall in such a way that the foot of the staircase is 5m away from the wall. Find how high the top of the staircase reaches on the wall

Step by step explanation please ​

Answer 1

Step-by-step explanation:

the wall is straight so it makes 90° with ground so assume it as right angled triangle

by Pythagoras property :

13² - 5² = the top of stairscase reaches on wall

169 - 25 = the top of staircase reaches on wall

144 = the top of staircase reaches on wall

12² = the top of staircase reaches on wall

I hope you understood