answers with explanation
Answers
Answer: (i) 2π cm² = 6.28 cm² (ii) 72π cm² = 56.52 cm² (iii) 50π = 157 cm²
Step-by-step explanation is given in the enclosed image.
Answer:
Step-by-step explanation:
(i)area of circle = πr²
so, area of semi circle is = 1/2πr² [∵semicircle is half of a circle so, in formula add 1/2 also because 1/2 shows half]
r=3cm (given)
area of semicircle=1/2×22/7×(3)²
=11/7×9
=18.14287 cm²
(ii)3×radius of smaller semicircle = 3×3=9
now , area of semicircle=1/2×22/7×(9)²
=127.285714
* similarly find area of semicircle at C by taking radius = 6cm
(iii)area of shaded region= area of bigger semi circle-area of 2 semi circle
=127.285714-56.571428-18.14287
=88.857
= ≈ 88.86