A hand fan is made by stitching 6 equal size triangular strips of two different types of paper as shown in figure. The dimensions of equal strips are 37.5 cm, 37.5 cm and 21 cm. Find the area of each type of paper needed to make the hand fan.
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Step-by-step explanation:
The dimensions of equal strips are 25 cm, 25 cm and 14 cm.
Then area of each strip=
s(s−a)(s−b)(s−3)
=
32(32−25)(32−25)(32−14)
=
32×7×7×18
=168
Then total the area of each type of paper needed=168×5=840cm
2
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