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zysi [14]
3 years ago
12

Can somebody please help me with this question?

Mathematics
2 answers:
Alekssandra [29.7K]3 years ago
5 0

Answer:

Step-by-step explanation:

Sum of measures of exterior angles of polygon = 360

x + 6 + x + 114 = 360

2x + 120 = 360   {subtract 120 form both sides}

2x = 360 - 120

2x = 240   { divide both sides by 2}

x = 240/2

x = 120

x + 6 = 120 +6 = 126

Measures of exterior angles : 120 ; 126 ; 114

Aliun [14]3 years ago
4 0

Answer:

120, 114, 126

Step-by-step explanation:

Since these are all exterior angles, they will all always add up to 360°. Since we know this, you can set up an equation and it would be x+(x+6)+114=360. When added you get 2x+120=360. Now subtract 120 on each side to get 2x equals 240. Then you divide by 2 and get that x is 120. Now all you have to do is plug x into the equations for the angles so they would be 120, 114, and 120+6 so 126. Now you have 120,114,and 126 as your angles. To check, just add all the angle measurements up and it should equal 360.

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Find (a) arc length and (b) Area of a sector.
barxatty [35]

Answer:

a) 29.45 cm (2 dp)

b) 220.89 cm² (2 dp)

Step-by-step explanation:

<u>Formula</u>

\textsf{Arc length}=r \theta

\textsf{Area of a sector}=\dfrac{1}{2}r^2 \theta

\quad \textsf{(where r is the radius and}\:\theta\:{\textsf{is the angle in radians)}

<u>Calculation</u>

Given:

  • \theta=\dfrac{5 \pi}{8}
  • r = 15 cm

\begin{aligned}\implies \textsf{Arc length} & =r \theta\\& = 15\left(\dfrac{5 \pi}{8}\right)\\& = \dfrac{75}{8} \pi \\& = 29.45\: \sf cm\:(2\:dp)\end{aligned}

\begin{aligned} \implies \textsf{Area of a sector}& =\dfrac{1}{2}r^2 \theta\\\\ & = \dfrac{1}{2}(15^2) \left(\dfrac{5 \pi}{8}\right)\\\\& = \dfrac{225}{2}\left(\dfrac{5 \pi}{8}\right)\\\\ & = \dfrac{1125}{16} \pi \\\\& = 220.89 \: \sf cm^2\:(2\:dp)\end{aligned}

5 0
2 years ago
The bearing of a from b is 067 degrees. what is the bearing of b from a?
Zigmanuir [339]
In this case since 067 is less than 180, 180 will be added to it to find the bearing of b from a.
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the bearing of b from a is 247
or 
subtract 067 from 360
360-067=293 
I am not sure of the right answer but I hope this helps.
6 0
3 years ago
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