Question

pls ans ques no.8 its urgent

Answer 1

the answer is 5.1cm
as it a equilateral triangle inside a circle so its centroid will be the centre of circle too
so now we now the side of triangle as 9cm so now half of it is 4.5 now take the cos30 =base/hypo.
now cos30=√3/2 so
√3/2=base/hypotenuse
base=4.5 now substitute it √3/2×hypotenuse=4.5
or hypotenuse=4.5×2/√3
hypo=5.1 which is the radius or circle too
happy studying

Answer 2

the answer is 5.1cm as there is a equilateral triangle