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3.8862
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Example: What is the area of a circle whose diameter is 10 cm?
Given: Diameter(d) = 10cm; So, Radius(r) = Diameter/2 = 10/2 = 5cm
Area of a circle: πr2 = π x 52 = π x 25 = 25π sq cm
Given: Diameter(d) = 10cm; So, Radius(r) = Diameter/2 = 10/2 = 5cm
Area of a circle: πr2 = π x 52 = π x 25 = 25π sq cm
Example: What is the area of a circle whose radius is 5 cm?
Given: Radius(r) = 5 cm
Area of a circle: πr2 = π x 52 = π x 25 = 25π sq cm
Given: Radius(r) = 5 cm
Area of a circle: πr2 = π x 52 = π x 25 = 25π sq cm
Example: -4
4
Example: 22
-21
22
23
Example: 2 + |-3| =
1
5
-1
Example:
|-4| - 2 =
2
Example:
40
-2
20
15
-20
Example:
|-75|
-5
-15
Example: 22
4
22
2
Example: 23
8
6
4
Example: 23 =
8
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