An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.

A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r²h and the surface area is 2(π r²) + 2π rh.

The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:

z² - 4z + 4 = 0
(z - 2)(z - 2) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, (z - 2) must equal zero:

If (z - 2) = 0, z must equal 2

So the solution is that z = 2

The area of a rectangle is equal to its length x width:

a = l x w
a = a x b
a = 1 x 2
a = 2

According to the Pythagorean theorem, the hypotenuse squared is equal to the sum of the two perpendicular sides squared:

c² = a² + b²
c² = 6² + 5²
c² = 36 + 25
c² = 61
c = \( \sqrt{61} \)