Question

n aunt is moving around a few pieces of different shapes scratching on the floor for which food is good and have to take a walk around the circumference of a circle can be opened by using their expression circumference is equal to 2 Pi r​

Answer 1

Answer:

(a) Perimeter of figure =

2

2πr

+2r=r(π+2)=

2

2.8

(π+2)=7.19 cm

(b) Perimeter =1.5+1.5+2.8+π(

2

2.8

)=10.19

(c) Perimeter =π(

2

2.8

)+2+2=8.39

Clearly, for food

′

b

′

the ant has to go more

Answer 2

$\pink{(a) \: perimeter \: of \: figure = \frac{2\pi \: r}{2r} = r(\pi + 2) }$

$\pink{ \frac{2.8}{2}(\pi + 2) = 7.19cm }$

$\purple{(b) \: perimeter = 1.5 + 1.5 + 2.8 + \pi( \frac{2.8}{2} ) = 10.19}$

$\orange{(c) \: perimeter = \pi( \frac{2.8}{2}) + 2 + 2 = 8.39 }$

clearly, for food $\red{B}$ the ant has to go more.