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juin [17]
3 years ago
15

Please help, I need this done within 2 hours...

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
5 0

Answer:

12. 108 degrees

13. 150 degrees

15. 40 degrees

16. 30 degrees

Step-by-step explanation:

12. 540 is the total degrees inside a pentagon, and since it is regular (every side is equal) you divide 540/5 to get 108

13. 1800 is the total degrees inside a dodecagon, and since it is regular (every side is equal) you divide 1800/12 to get 150

15. 1260 is the total degrees inside a nonagon however since it is asking for the exterior angle you take 1260/9 to get 140 and since every straight line is 180 degrees you subtract 140 from 180 to get 40 degrees.

16. 1800 is the total degrees inside a 12-gon (dodecagon) however since it is asking for the exterior angle you divide 1800/12 to get 150 degrees which since every straight line is 180 you subtract 150 from 180 to get 30 degrees.

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7nadin3 [17]

The width of the lake on the scale drawing is 12.5m

<h3>Scale drawing</h3>

A scale drawing is an enlargement of an object. Given that the scale drawing of a lake has a scale of 1 cm to 80 m, then;

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If the actual width of the lake is 1,000 m, then the lake on the scale is as shown;

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Lake on the scale = 12.5cm

Hence the width of the lake on the scale drawing is 12.5m

Learn more on scale drawing here; brainly.com/question/25324744

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