In A DEF, C is the centroid. If EC = 20 cm, find the length of EJ E D O 30 O 40 O 10 25 >H F

Two boats start their journey from the same point A and travel along directions AC and AD, as shown below: 100 ft 6 60 В 30 What is the distance, CD, between the boats? 284.3 ft O 115.5 ft 230.9 ft O 173.2 ft

Suppose u = 〈1, 2, 3〉 and v = 〈0, −1, 1〉. Find the area of the triangle that has two sides formed by u and v.