3 years ago

How many reflectional symmetries does a regular decagon have ?

2 answers:

7 0

I believe the answer is 5

6 0

The answer to this is ten.

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antiseptic1488 [7]

Sorry bro, maybe next time :/

4 0

3 years ago

podryga [215]

To solve this problem you must apply the proccedure shown below:

1. Clear the radius from the formula for the circumference of a circle and substitute values, as following:

$C=2\pi r\\ r=C/2\pi \\ r=37.699in/2\pi \\ r=5.99in$

2. Substitute the radius calculated into the formula for calculate the surface area of the sphere:

$SA=4\pi r^{2} \\ SA=4\pi(5.99in^{2})\\ SA=450.88in^{2}$

The answer is: $450.88in^{2}$

5 0

3 years ago

Sonja [21]

Answer:

Step-by-step explanation:

<u>if we divide 20 and 25 by 5 then we get 4/5.</u>

5 0

2 years ago

Sati [7]

This is true.
These are perfect squares: 4, 9, 25. These are not: 7, 8, 11

8 0

3 years ago

Nady [450]

Answer:

Step-by-step explanation:

8 0

3 years ago