Question

3. The given fig. 15.14 is a circle with centre O and
angle AOB = 90° and OA = 3 cm, then find the area
of the shaded region.

Fig. 15.14
​

Answer 1

Step-by-step explanation:

AO=BO=3CM

AREA OF A TRIANGLE= (1/2)bh

=1/2× 3×3

=1/2×9

=4.5cm²

theta=90°=π/2

AREA OF A SECTOR= 1/2 r² theta

=1/2×9×π/2

=1/2×9×22/14

≈7 cm²

Area of shaded part= 7- 4.5

= 2.5cm²

Answer 2

Answer:

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