The ladder

The ladder has a length of 3 m and is leaning against the wall, and its inclination to the wall is 45°. How high does it reach?

Correct result:

h =  2.1213 m


A=45 B=90A=9045=45 c=3 m  sinB=h:c  h=c sinB  h=c/2=3/2=2.1213 m

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