Answer:
In a quadrilateral, the two pairs of opposite angles are congruent. One of the properties of any quadrilateral is that the opposite angles must be congruent.
Step-by-step explanation:
Answer:
x= 0, 1/2
Step-by-step explanation:
Answer:
Option 2 is the correct answer.
Step-by-step explanation:
We know that

We have 1 mile = 5280 feet thus 6 miles = 31680 feet
Similarly 1 hour = 3600 seconds
Applying values in the equation above we get

Thus his average speed is less than 18feet/sec