Complete the area formula

Exercise and reference answers

Missing parts

1. Answer

   ½

   Choices

   1. ½
   2. ⅓
   3. 2

2. Answer

   1s

   Choices

   1. 1s
   2. 0s
   3. y values

3. Answer

   zero

   Choices

   1. zero
   2. negative
   3. undefined

Complete the statement

The area of a triangle with vertices (x₁,y₁), (x₂,y₂), (x₃,y₃) is {0} times a 3 × 3 determinant whose last column is all {1}. If the three points are collinear the area is {2}.

Explanation