Triangle ABC, with vertices A(5,-9), B(7,-3), and C(2,-4), is drawn inside a rectangle, as shown below.

Find the area of the reactangle: Area = 5 * 6

Then find the area of the three right triangles

(1 * 5) / 2 = Area of top-side triangle

(3 * 5) / 2 = Area of left-side triangle

(2 * 6) / 2 = Area of right-side triangle

Now add all areas of all the triangles and subtract it from the rectangle.

This is the area inside the triangle

Step-by-step explanation:

r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)