For triangle I
This triangle is an isosceles triangle.
Perimeter = 2s = (5 + 5 + 1) cm = 11cm.
For quadrilateral II
This quadrilateral is a rectangle.
Area = l × b = (6.5 × 1) cm2 = 6.5 cm2
For quadrilateral III
This quadrilateral is a trapezium.
Total area of the paper used = 2.488 + 6.5 + 1.299 + 4.5 × 2 = 19.287 cm2