Question

Help me to do this



Pls

Answer 1

Answer:

BC square = ab square + ac square

Answer 2

Answer:

by Pythagoras theorem

(hypotenuse)^2 = (base) ^2 + (height) ^2

x^2= 40^2 + 9^2

x^2= 1600+81

x^2=1681

x=√1681

x=41