Answer:
Square inches of fabric required = 12
Step-by-step explanation:
Distance from (a,b) to (c,d) .
Distance from (7, 7) to (10, 3)
Distance from (10, 3) to (7, 3)
Distance from (7, 3) to (7, 7)
Area of triangle , where
Here a = 5, b = 3 and c = 4
Area of triangle
Area of pillow = 2 x Area of triangle = 2 x 6 = 12 square inch
Square inches of fabric required = 12