Pls help!
and a reason.

Step-by-step explanation:

Given

Required

Determine the missing angles

Since AB = AD, then:

--- Base angles of an isosceles triangle

Hence:

--- angles in a triangle

Collect Like Terms

--- angle on a straight line

Since ABC is isosceles, then:

--- base angle of isosceles

Lastly:

See attachment

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm