What is - 2 x 6 - 5^2?
1 answer:
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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.
A regular octagon has all its eight sides congruent. The line segments joining each of the vertices of a regular octagon to its center are called the radii of the octagon. These 8 radii divide a regular octagon into 8 congruent isosceles triangles. Area of each isosceles triangle is
,
where a is length of the side of the octagon and is the angle between two radii of the octagon.
In regular octagon
.
Then the area of regular octagon is
sq. m.
Answer: sq. m.