Radha made a picture of an aeroplane with coloured papers as shown in the given figure. Find the total area of the paper used.
For triangle I
This triangle is an isosceles triangle.
Perimeter = 2s = (5 + 5 + 1) cm = 11cm
Area of the triangle
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.
Perpendicular height of parallelogram
Area = Area of parallelogram + Area of equilateral triangle
= 0.866 + 0.433 = 1.299 cm2
Area of triangle (IV) = Area of triangle in (V)
Total area of the paper used = 2.488 + 6.5 + 1.299 + 4.5 × 2
= 19.287 cm2