please who can solve this this is between life and death
Answers
Step-by-step explanation:
a)Area= Area of circle - Area of square
area = {(pi)*(r^2)}-2^2
area = (pi*81)-4
area = 254.57-4
area = 250.57cm2 or 81pi-4cm2
b)Area= Area of square - Area of circle
area = (8*8)-(pi*{4^2})
area = 64-16pi
area = 13.73cm2
c)Area= Area of the rectangle - Area of large circle - Area of small circle
area = (7*12)-(pi*{2^2})-(pi*{1^2})
area = 84 - 4pi - pi
area = 84-5pi m2
area = 68.29m2
d)Area= Area of the triangle - Area of the circle
area = {(1/2)*10*15} - {pi*(2.5^2)}
area = 75 - (25/4)pi cm2
area = 55.37cm2
e)Area= Area of trapezium - Area of the circle
area = {[(19+12)/2]*15} - {pi*5^2}
area = (232.5)-25pi cm2
area = 153.96cm2
f)Area= Area of the rectangle + Area of the 2 sectors
area = (3*12) + 2({1/2}*pi*6^2)
area = 36 + 36pi cm2
area = 149.1 cm2
Hope its helpful
Given : Few figures with shaded region
To find : Shaded area
Solution:
2 a) Diameter = 18 cm
Radius = 18/2 = 9 cm
Area of Shaded region = Area of Circle - Area of Square
= π (9)² - 2²
≈ 250 cm²
2b) Diameter = 8 cm Radius = 4 cm
Area of Shaded region
= Area of Square - Area of Circle
= 8² - π4²
≈ 14 cm²
2 c) 12² - π2² - π1² = 144 - 5π ≈ 128 cm²
2 d) (1/2)10 * 15 - π (5/2)² ≈ 55 cm²
2 e) (1/2)(19 + 12) * 15 - π (5)² ≈ 154 cm²
2 f) 12 * 3 + (1/2)π6² + (1/2)π6² ≈ 149 cm²
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