(i) a triangle of sides 7.8 cm, 6.5 cm and 5.9 cm,
ü an equilateral triangle of side 9.4 cm,
an isosceles triangle with equal sides 8.5 cm each and third side 7 cm.
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Answer:
perimeter. =sum of all sides
=7.8 cm +3.5 cm+5.9 cm
=20.2
perimeter =3×8
=3×9.4
=28.2
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