y = (5/2)x + 1/2
The square root of 16 is 4.
The area of a rectangle is length multiplied by width, or A = lw.
The equation of a circle with center (h,k) and radius r is (x-h)^2 + (y-k)^2 = r^2.
The sum of the angles in a triangle is always 180 degrees.
The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides.