Question

plz answer fast with explaining ​

Answer 1

Step-by-step explanation:

by Pythagoras theorem 41sq +40sq

Answer 2

Step-by-step explanation:

let AB = x

by paythgoras theorem

AB^2+BC^2=AC^

so we need to find AB

so

AB^2={AC^2-AB^2}

AB^2={41^2-40^2}

AB^2={1681-1600}

AB^2={81}

so AB= √81 = 9

so AB=9

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