Question

find the length of red coloured tape required to frame the traafic signal borad in the shape of an isosceles triangle with equal sides as 10 cm each and the base as 7 cm

Answer 1

perimeter of triangle = sum of all it's sides
= 10+10+7
= 27 cm

Answer 2

perimeter of the isosceles triangle is equal to length of the tape
perimeter of the isosceles triangle=sum of its all sides
perimeter =10+10+7=27
therefore the length of the tape is equal to 27cm