Radha made a picture of an airplane with coloured paper . Find the total area of the paper used.
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Step-by-step explanation:
The picture of the aeroplane with coloured paper is a combination of multiple diagrams: triangle, rectangle, trapezium.
By using Heron’s formula, we can calculate the area of a triangle.
Heron's formula for the area of a triangle is: Area = √s(s - a)(s - b)(s - c)
Where a, b and c are the sides of the triangle, and s = Semi-perimeter = Half the Perimeter of the triangle
i) For the triangle marked as I:
It is an isosceles triangle, therefore a = 5 cm, b = 5 cm, c = 1 cm
Semi Perimeter: (s) = (Perimeter/2)
s = (a + b + c)/2
= (5 + 5 + 1)/2
= 11/2
= 5.5 cm
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