Any genius can plzz solve this question.
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sandiprajrishi2005:
DAV public school,Bhagalpur.
according to the answer oh book is wrong
of
sirf perimeter ka anawer wrong diya hai
area ka answer sahi diya hai
according to my answer is 99.99%corrrct
aapka answer ke liye 0.01% chhor diya mainne
perimeter ka answer kya hai
mera answer main dekh li
lo
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I hope it help u
plz mark as brainlist
plz mark as brainlist
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Radius = 6cm
AB = BC = CD
Let the centre point of the circle be O.
AO = OD = 6cm
AB = BC
AB + 1/2 BC = radius = 6cm
AB + 1/2 AB = 6cm
3/2 ( AB ) = 6cm
AB = 6*2 / 3 cm
AB = 4 cm
Since, AB = BC = CD = 4cm
So,
For Perimeter of shaded region ,
AB as a diameter.
So, radius = 1/ 2 AB = 1 /2 ( 4 ) = 2 cm
Circumference of Diameter AB, C1 = pi r = 3.14 × 2 = 6.28 cm
Circumference of diameter AD, C2 = pi r = 3.14 *6
= 18.84 cm
Circumference of Diameter BD, C3 = pi r = 3.14 * 4 = 12.56 cm
Adding all Circumferences = C1 + C2 + C3 = 6.28 + 18.84 + 12.56 = 37.68 cm
For Area of the shaded region,
Area of semicircle with diameter AB, A1 = 1/2 pi r^2
= 1 / 2 * 3.14 * 2 *2 = 6.28 cm^2
AREA of semicircle with diameter AD, A2= 1/2 pi r^2
= 1 / 2 *3.14 * 6 *6 = 56.52 cm^2
AREA of semicircle with diameter BD, A3 = 1 / 2 pi r^2
= 1 / 2 * 3.14 * 4 *4 = 24. 12 cm^2
Area of shaded region = A1 + ( A2 - A3 )
= 6.28 + 56.52 - 24.12
= 6.28 + 32. 40
= 38. 68 cm^2
AB = BC = CD
Let the centre point of the circle be O.
AO = OD = 6cm
AB = BC
AB + 1/2 BC = radius = 6cm
AB + 1/2 AB = 6cm
3/2 ( AB ) = 6cm
AB = 6*2 / 3 cm
AB = 4 cm
Since, AB = BC = CD = 4cm
So,
For Perimeter of shaded region ,
AB as a diameter.
So, radius = 1/ 2 AB = 1 /2 ( 4 ) = 2 cm
Circumference of Diameter AB, C1 = pi r = 3.14 × 2 = 6.28 cm
Circumference of diameter AD, C2 = pi r = 3.14 *6
= 18.84 cm
Circumference of Diameter BD, C3 = pi r = 3.14 * 4 = 12.56 cm
Adding all Circumferences = C1 + C2 + C3 = 6.28 + 18.84 + 12.56 = 37.68 cm
For Area of the shaded region,
Area of semicircle with diameter AB, A1 = 1/2 pi r^2
= 1 / 2 * 3.14 * 2 *2 = 6.28 cm^2
AREA of semicircle with diameter AD, A2= 1/2 pi r^2
= 1 / 2 *3.14 * 6 *6 = 56.52 cm^2
AREA of semicircle with diameter BD, A3 = 1 / 2 pi r^2
= 1 / 2 * 3.14 * 4 *4 = 24. 12 cm^2
Area of shaded region = A1 + ( A2 - A3 )
= 6.28 + 56.52 - 24.12
= 6.28 + 32. 40
= 38. 68 cm^2
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