An umbrella is made by stitching 8 triangular pieces of cloth of two different colours, each piece measures 60cm, 60cm and 20cm. How much cloth of each colour is required for the umbrella?

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Class 9 Maths Practice Test: Heron’s Formula - Application of Heron’s Formula in Finding Areas of Quadrilaterals — practice the complete quiz, review flashcards, or try a random question.

The Heron’s formula to find area of a quadrilateral is [√s1(s1 - a)(s1 - b)(s1 - e)] + [√s2(s2 - d)(s2 - c)(s2 - e)] where s1 is the semi-perimeter of one triangle and s2 is the semi-perimeter of another triangle. a,b,c,d are the sides of the quadrilateral and e is the length of the diagonal.

Heron’s formula is used to find the area when the lengths of the four sides are given along with the diagonal length.


An umbrella is made by stitching 8 triangular pieces of cloth of two different colours, each piece measures 60cm, 60cm and 20cm. How much cloth of each colour is required for the umbrella?