Question

The top of ladder rest along a wall at a height of 3.2m from the ground. it's lower and is at distance of 2.4cm from the wall find length of ladder

the question is from Pythagoras theorem ​

Answer 1

Please see the attachment

Answer 2

ac2=bc2+ab2

3.2^2=2.4)^2+ab^2

10.24=5.76+ab^2

10.24-5.76=4.48=ab^2

ab=(4.48)^1÷2

=2.11cm