Solution:
For each triangular piece, The semi perimeter will be
s = (50+50+20)/2 cm = 120/2 cm = 60cm
Using Heron’s formula,
Area of the triangular piece
=
= √[60(60-50)(60-50)(60-20)] cm2
= √[60×10×10×40] cm2
= 200√6 cm2
∴ The area of all the triangular pieces = 5 × 200√6 cm2 = 1000√6 cm2
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