arithemetic mean
The circles are "concentric".
Circle is a shape. We have gotten to know a lot from circles. Because of circles, we get PI, radius, diameter, circumference, and other things. Circles fall into geometry, which is math. We can make many mathematical equations from circles.
Well, in math you solve the perimeter of circles and such, and learn understanding of them to help you with circles in real life.
acute, obuse, or right angles
A square pyramid has a total of 8 angles. Each of the 4 triangular faces has 3 angles, totaling 12 angles. However, 4 of these angles are shared where the faces meet at the base, resulting in a total of 8 unique angles in a square pyramid.
A compass.
It is "a pair of compasses" - usually called a compass.
Acute is in math, more likely in the geometry area. Acute angles are angles that are less then 90 degrees.
That depends on the question.
math is adding, subtracting, multiplying, dividing, angles and more
The final sum, difference, product or quotient. Usually, it's the answer.