A plane flies northward for 430km, it then flies eastwards for 380km.How far is it from the starting point?
what is sqrt(430^2+380^2)?
First draw the north,south,west,east.
a^2=b^2+c^2
So the north will be b
b=430km
So the east will be c
c=380km
So now let's focus on the hypotenuse
According to Phythagoras Theorem
a^2=b^2+c^2
a^2=430km^2+ 380km^2
a^2=184900km+144400km
a^2=329300
Take the square root of both sides
a=573.846669km
a=573.8km
b=430km
So the east will be va