The Theorem of Pythagoras (Leaving Cert Mathematics): Flashcards

Triangle with one angle of exactly 90 degrees

Side opposite the right angle in a right-angled triangle

Always the longest side of the triangle

Greek mathematician who proved the theorem

Area of square on hypotenuse = sum of areas of squares on other two sides

$a^2 = b^2 + c^2$ where $a$ is hypotenuse

Right-angled triangles only (with 90° angle)

Identify the hypotenuse (opposite right angle)

Square lengths, add/subtract, take square root

Hypotenuse should be longer than both other sides

Take the square root

Directly opposite the right angle