Question

ABCDEFGH is a regular octagon inscribed in a circle with radius 9cm.Find the length of minor arc AB?​

Answer 1

Step-by-step explanation:

Central angle=360/8=45 degree

r=9cm

Length of minor arc AB =

45x3,14x9^2/360=3.14x8l/8=31.8cm

=

Answer 2

we know that, measure of circle =360°

all sides of octagon are equal .

hence- central angle = 360°÷8 =45°

theta - 45° = (45×pi÷180) radian

hence Measure of angle central angle in radian is pi÷4 radian

now , we know that S=r× theta ( length of arc = radius × theta)

= 9( radius)×pi÷4

= (9pi÷4) radian