Yes it is. Input the numbers into the pythagorean theorem,

and if they equal each other it is a right triangle.
Answer:
Step-by-step explanation:
∠4=∠1
Answer:
$92492.40
Step-by-step explanation:
168168.00 - 55% (75675.60)= $92492.40
2.5 hours, because 10 miles an hour times 2 = 20 plus half the time? 2.5
You can seperate it into two triangles then take the area of each of those (a=1/2bh) and add each triangles area together