please help and show work

Answer:
Step-by-step explanation:
3) JH is the length of the radius
def. of midpoint
def. of < bisector
4) The missing length is 15
Given a=8 and c=17,
b = 30
∠α = 28.072° = 28°4'21" = 0.48996 rad
∠β = 61.928° = 61°55'39" = 1.08084 rad
area = 60
perimeter = 40
h =
120
17
= 7.0588235294118