Question

if each side of an equilateral triangle is doubled then find how much percent of area is changed

Answer 1

hey!!!!

3+3+3+3+3+3
= 18cm

Old area:(before doubling)
b×h
Consider the base as 3cm and height as 5 cm
So area=15cm

New area: (after doubling)
b×h
Consider the base 18cm and height 5cm
So area= 90cm

Percentage of area changed:
$\frac{15}{90} \times 100$
$= 16.666\%$


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