Question 1117039
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The rectangular base of the window is a rectangle 45x63 inches, with an area of 2835 square inches.<br>
The triangular arrowhead can be viewed as two right triangles, each with hypotenuse 50 inches and one leg 40 inches -- making the other leg 30 inches.  So the base of the triangular arrowhead is 30+30=60 inches; the area is one-half base times height, or 30*40 = 1200 square inches.<br>
So the total area of the window is 2835+1200 = 4035 square inches.<br>
The part of the perimeter of the window that is on the rectangular part of the window is (63+63+45) = 171 inches.  The part of the perimeter that is on the triangular part is (50+50+(60-45)) = 115 inches.<br>
So the perimeter of the window is 171+115 = 286 inches.