In these kind of problems, it's always the best to just draw it. There are "formulas" to calculate this, but it's better to know intuitively.
Midpoint, as the name suggests is the point that is exactly halfway between two points. To find a midpoint in one dimension, we would take an average between those two points.
Example: Number exactly halfway between 8 and 16 is

We can do the same for two dimensions, it just means we'll have to calculate both for x-values and y-values
Midpoint
Using the identity (a+b)(a+b) = a^2 + 2ab + b^2 we get the answer 4Z^2 + 20Z + 25
Answer:
Option c
Step-by-step explanation:
We are given that the post office is at the corner of first street and main street and they form right angled .
We have to find the distance travel by car B to reach Oak street from First street
Let x be the distance traveled by car B on First street to get to Oak street
In right angled triangle NOE
OE=14 miles
NO=x





Therefore, option c is true.
A trapezium has a pair of parallel sides.