Guys i need these all questions answer
Answers
bhai ab toh ho gya paper maths ka
Step-by-step explanation:
Question 2 :
r = 6 cm , central angle ( Ф ) = 60°
We know that area of sector = Ф/360 x πr²
Substitute the values and you get
Area of sector = 60/360 x 22/7 x 6 x 6
= 22 x 6 / 7
= 18.85 cm²
Question 3 :
r = 21 cm and central angle ( Ф ) = 60°
Substitute the values in the area of sector formula and you get
Area of sector = 60/360 x 22/7 x 21 x 21
= 22 x 21 /2
= 11 x 21
= 231 cm²
But area of sector is also = length of arc x r / 2
Substitute the values and you get
231 = l x 21 / 2
l = 231 x 2 / 21
l = 22 cm
Area of sector is 231 cm² and length of arc is 22 cm.
Question 4 :
R1 = 7 cm and R2 = 14 cm , central angle ( Ф ) = 40°
Area of shaded region = Area of bigger sector - Area of smaller sector .
You already know the area of sector formula, find the area of smaller and bigger sector and you get
Area of smaller sector = 40/360 x 22/7 x 7 x 7
= 17.1 cm²
Area of bigger sector = 40/360 x 22/7 x 14 x 14
= 68.4 cm²
Area of shaded region = 68.4 - 17.1
= 51.3 cm²
The 5th and 6th questions are easy but very lengthy.
Please ask new question for them and i will answer them.
I don't want to extend this answer, but don't worry the remaining sums are easy.
Hope this helped you and mark me as brainliest if my answer helped you.