The length of AB is __

Question

asked Mar 13, 2021 201k views

2 Answers

Pawan Bishnoi · Answer 1 · 2021-03-14T21:51:32+0000

Answer:

AB = 3.5π

Explanation:

The length of arc AB is calculated as

AB = circumference of circle × fraction of circle

= 2πr ×
(90)/(360) ( r is the radius and r = 7 )

= 2π × 7 ×
(1)/(4)

=
$(14\pi )/(4)$ = 3.5π

Rilwan · Answer 2 · 2021-03-16T23:03:41+0000

Answer:

The length of arc AB = 10.99 inch.

Explanation:

We know that,

The length of any arc of a circle = Radius of circle
Angle subtended by arc at centre of circle.

According to the figure,

Angle subtended by arc at centre,
$\alpha$ =
$(\pi )/(2)$

Radius of the circle,
= 7 inch.

The length of arc AB =
$R*\alpha$

=
$7*(\pi )/(2)$

= 10.99 inch.