Prove that the diagonal of a parallelogram divides it into two congruent triangles.

Write all the properties of natural numbers in symbols.

Write the mathematical statements for the given sentence.

The sum of two sides of a triangle is greater than the third side.

Write the mathematical statements for the given sentence.

The sum of two fractional numbers is also a fractional number.

State whether the given statement is true or false. Justify your answer.

The sum of interior angles of a quadrilateral is $350°$.

State whether the given statement is true or false. Justify your answer.

$x^2\ge 0$ for a real number $x$.

State whether the given statement is true or false. Justify your answer.

The sum of two even numbers is always an even number.

State whether the given statement is true or false. Justify your answer.

All prime numbers are odd.

State whether the given statement is true or false. Justify your answer.

$3n+1>4$, where $n$ is a natural number.