Math, asked by thrisuna, 1 year ago

A hand fan is made by stitching 8 equal size triangular strips of two different types of paper as shown in figure. the dimensions of equal strips are 25 cm, 25 cm and 14 cm. Find the area of each type of paper needed to make the hand fan

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Answered by vibhutiminghlani

Answer:

I have solved your question,hope it helps,if you have any doubt then you can ask me!

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thrisuna: how did u get 32

vibhutiminghlani: it is the formula, s stands for semi perimeter,that is sum of the three sides divided by 2 or can also be called as dividing the perimeter by 2

vibhutiminghlani: so in this case, 32 is the semi perimeter

thrisuna: oh thx so much

vibhutiminghlani: You're Welcome!

Answered by aakashmutum

Let a = 25cm, b = 25cm, c = 14cm

s = a+b+c/2 = 25+25+14/2

= 64/2 = 32cm

Area = √s(s-a)(s-b)(s-c)

= √32*7*7*18

= √2*2*2*2*2*7*7*2*3*3

= 2*2*2*7*3

= 8*21

= 168cm²

Area of 1 triangular strip = 168cm²

Area of 5 traingular strips = 168*5 = 840cm²

⇒Area of 5 first type of strips = 840cm²

Area of 5 second type of strips = 840cm²

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A hand fan is made by stitching 8 equal size triangular strips of two different types of paper as shown in figure. the dimensions of equal strips are 25 cm, 25 cm and 14 cm. Find the area of each type of paper needed to make the hand fan​

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A hand fan is made by stitching 8 equal size triangular strips of two different types of paper as shown in figure. the dimensions of equal strips are 25 cm, 25 cm and 14 cm. Find the area of each type of paper needed to make the hand fan