Answer:

Step-by-step explanation:
This answer is easily found using the Pythagorean Theorem:

where A and B are the legs, and C is the hypotenuse of the triangle.

it depends how long the width and the length is. If the length is 5 cm and the width is 4 cm the perimeter will be 18cm. All you have to do is 5 doubled because there 2 sides for the length and 4 doubled because there are 2 sides for the width. I hope I have answered your question. XD
Answer:
2.5
Step-by-step explanation:
so LM is 3 right, right?
so PQ is 6
what they did to get that is they doubled 3 so 3x2=6
so if we divide 5 by 2 we get 2.5 because 2.5+2.5= 5
and that is how i got 2.5
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Answer:
If the circle shown (which I can't see) has a radius of 2, then it's equation 3, if the radius is 4, then it's equation 4.
Step-by-step explanation:
The equation for a circle is 
Where (h, k) is the center and r is the radius.