Answer:
The angle of DC is 130°.
Step-by-step explanation:
Given tha total angle in a centre(O) of circle, is 360. So in order to find ∠DOC, you have to subtract 85° and 145° from 360° :
∠COD = 360° - ∠COE - ∠DOE
= 360° - 85° - 145°
= 130°
Answer:
h = 16
Step-by-step explanation:
By applying the Pythagorean Theorem, the slant height is given by the formula:

34 = 





Answer:
a) 0.0137060668
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I not know b part.
I might be wrong but 9
9*2=18
18+7= 25
25 square root = 5
Answer is 9