Abstract
In the current article, the researcher presents a new method for finding the area of a right-angled triangle through the hypotenuse and one of the two acute angles in the triangle. It is used in the case of knowing both, and this rule is considered by the researcher as a qualitative leap in the world of mathematics that helps students, mathematicians, and those interested in mathematics to calculate the area of a right-angled triangle when the data is the length of the hypotenuse and the measure of any of the two acute angles in it.