a. b. 3 cm find the area of the shaded portion inthe following figures π =3.14
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Step-by-step explanation:
AC is the diameter of the circle.
In the right angled triangle ADC, we have
AC
2
=AD
2
+DC
2
(Pythagoras theorem)
AC
2
=5
2
+12
2
AC
2
=25+144
AC
2
=169
AC=13 cm
Radius of the circle =
2
AC
=
2
13
=6.5 cm
Area of the shaded part = Area of the circle − Area of the rectangle
= πr
2
−lb
= 3.14×6.5
2
−(5×12)
=132.665−60
=72.665 cm
2
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