Area of the sector=degrees/360 times area
are=pir^2
d/2=r
9.1=d, 9.1/2=4.55
areasector=170/360 times pi*4.55^2
areasector=17/36 times pi times 20.7025
using our calculator
30.712777013
round
30.7 square cm
Answer:
Angle 2 & 4 = 72
Step-by-step explanation:
Angle 7 is corresponding to angles 3.
So, since we know angle 7 = 108, then angle 3 = 108.
Angle 3 is supplementary to angle 2, which means they add up to 180º.
So if angle 3 = 108.
Then:
Angle 2 + 108 = 180
Angle 2 = 72º.
Angle 2 & angle 4 are vertical angles, so they have the same measure. Therefore,. If angle 2 is 72º, then angle 4 has to also be 72º.
Hope this helps! Have a great day!
-210,369 that is your correct answer
Answer:
60°
Step-by-step explanation:
We'll begin by calculating EC. This can be obtained as follow:
Angle EAC = 39°
Hypothenus = EA = 3.7 m
Opposite = EC =?
Sine EAC = Opposite /Hypothenus
Sine 39 = EC / 3.7
Cross multiply
EC = 3.7 × Sine 39
EC = 2.3 m
Finally, we shall determine angle BEC. This can be obtained as follow:
Adjacent = EC = 2.3 m
Hypothenus = BC = 4.6 m
Angle BEC =?
Cos BEC = Adjacent / Hypothenus
Cos BEC = 2.3 / 4.6
Cos BEC = 0.5
Take the inverse of Cos
BEC = Cos¯¹ 0.5
BEC = 60°
Thus, angle BEC is 60°
