an umbrella is made by stitching 10 triangular pieces of cloth of two different colours,each piece measuring 30 cm, 50 cm and 50 cm. how much cloth of each color is required for the umbrella?
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Answer:
Step-by-step explanation:
area of 1 triangle = √(s(s-a)(s-b)(s-c))
s= 30 + 50 + 50/2
= 130/2
= 65
area = √(65(65-50)(65-50)(65-30)
=√(65*15*15*35)
= 15√(65*35)
= 15√(5*5*7*13)
= 15*5√(7*13)
= 75√91
= 75*9.53
= 714.75
Cloth required for each colour = 714.75*5
= 3573.75 sqcm
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