What is the area of this triangle?
a.) a=1/2(y3-y2)(x3-x1)
b.) a=1/2(y3-y1)(x3-x1)
c.) a=1/2(y3-y1)(x2-x1)
d.) a=1/2(y2-y1)(x3-x1)
e.) a=1/2(y2-y1)(x2-x1)

Option D is correct

Step-by-step explanation:

we have to find the area of triangle.

As we know area of triangle can be calculated by the formula

Base of triangle is the line joining the coordinates whose length is =

Now height of triangle is the perpendicular line from the vertex whose length is

Hence, area of triangle is

Option D is correct

if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: