The side opposite the right angle in a right triangle is called the opposite side.

The sum of the interior angles of a triangle is always 180 degrees.

A quadrilateral with all four sides of equal length is called a rhombus.

In a circle, the distance from the center to any point on the circle is called the radius.

The area of a triangle is given by the formula (1/2) * base * height.

The volume of a cube is given by the formula V = s^3, where s is the length of one side of the cube.

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

The area of a circle is given by the formula πr^2, where r is the radius of the circle.

The circumference of a circle is given by the formula 2πr, where r is the radius of the circle.

In a parallelogram, opposite sides are congruent.

The measure of an angle that is greater than 90 degrees and less than 180 degrees is called an obtuse angle.

The sum of the interior angles of a quadrilateral is always 360 degrees.

A polyhedron with 6 square faces is called a cube.

The volume of a cylinder is given by the formula V = πr^2h, where r is the radius of the base and h is the height of the cylinder.

The surface area of a sphere is given by the formula A = 4πr^2, where r is the radius of the sphere.