Step-by-step explanation:
it is an isoceles triangle (equally long legs).
there is a right angle at W, so YW is the height of the isoceles triangle XYZ.
that means W splits XZ in half.
therefore,
ZW = XZ/2 = 38/2 = 19
Vector
.
. So the sum is
.
For the second, the magnitude is the square root of the sum of the squares of the components. This is equal to
.
Step-by-step explanation: