App Logo

No.1 PSC Learning App

1M+ Downloads
Find the length of a sector with central angle 180 and radius 7cm

A22 cm

B36 cm

C7 cm

D44 cm

Answer:

A. 22 cm

Read Explanation:

Length of a sector=2πr×θ/360= 2\pi{r}\times\theta/360

=2×22/7×7×180/360=2\times22/7\times7\times180/360

=22cm=22cm


Related Questions:

The circumference of a circle is 11 cm and the angle of a sector of the circle is 60°. The area of the sector is (useπ=227)(use \pi=\frac{22}{7})

In a circle a chord, 3 centimetres away from the centre is 8 centimetres long. The length of the diameter of the circle is :
A chord of a circle is equal to its radius of length 9 cm. Find the angle subtended by it in major segment.
കേന്ദ്രം ആധാര ബിന്ദു ആയ വൃത്തം (3,4) എന്ന ബിന്ദുവിൽ കൂടി കടന്നുപോകുന്നുവെങ്കിൽ, വൃത്തത്തിന്റെ ആരം എത്ര?

In the figure, BC is a chord and PA is a tangent to the circle. PB=4 centimetres, PA=6 centimetres, the length of the chord BC is:

WhatsApp Image 2024-12-02 at 16.33.48.jpeg