Junior high school mathematics is a difficult subject, and there are many formulas and theorems to remember. Mastering these mathematical formulas is very helpful for answering the questions in the senior high school entrance examination. Below I have compiled the necessary formulas for junior high school mathematics for your reference!

Mathematical Formula Analysis of Pythagorean Theorem The sum of squares of sides of right triangle (including isosceles right triangle) is equal to the square of sides of hypotenuse (that is, the short side of hook and the long side of strand).

That is to say, if the two right angles of a right triangle are A and B and the hypotenuse is C, then the square of A+the square of B = the square of C? +b？ =c？ . That is to say, the sum of squares of the lengths of two right angles of a right triangle is equal to the square of the length of the hypotenuse.

Pythagorean theorem has found about 500 proofs, which is one of the theorems with the most proofs in mathematics.

Formulas commonly used in junior high school mathematics must be memorized.