1:how long is the diagnol of a square with the side of 10 metres?
2:a ship from a port to a lighthouse steams 8km east and 6km north. how far is the lighthouse from the port?
2. now its the same again, if you draw what it tells you, you get a triangle one side is 8 and one is 6, now use pythagoras
remember your trying to find the hypotenuse for each one