ANY PARTICULAR EXTENT OF SPACE OR SURFACE

A FIGURE IS THE TOTAL DISTANCE AROUND THE EDGE OF THE FIGURE.

IN A RIGHT TRIANGLE, A LEG IS EITHER OF THE TWO SIDES THAT FORM THE RIGHT ANGLE.

A RATIONAL NUMBER IS ANY NUMBER THAT CAN BE EXPRESSED AS THE QUOTIENT OR FRACTION P/Q OF TWO INTEGERS, WITH THE DENOMINATOR Q NOT EQUAL TO ZERO. SINCE Q MAY BE EQUAL TO 1, EVERY INTEGER IS A RATIONAL NUMBER.

AN IRRATIONAL NUMBER IS ANY REAL NUMBER THAT CANNOT BE EXPRESSED AS A RATIO OF INTEGERS.

IS THE LONGEST SIDE OF A RIGHT-ANGLED TRIANGLE, THE SIDE OPPOSITE OF THE RIGHT ANGLE.

A NUMBER THAT, WHEN MULTIPLIED BY ITSELF, WILL RESULT IN A GIVEN NUMBER.

IS A RELATION IN EUCLIDEAN GEOMETRY AMONG THE THREE SIDES OF A RIGHT TRIANGLE. IT STATES THAT THE SQUARE OF THE HYPOTENUSE (THE SIDE OPPOSITE THE RIGHT ANGLE) IS EQUAL TO THE SUM OF THE SQUARES OF THE OTHER TWO SIDES.

HAS ONE 90 DEGREE ANGLE AND TWO ACUTE (

A RIGHT ANGLE IS EQUAL TO 90 DEGREES.

IS A STATEMENT THAT IS BELIEVED TO BE TRUE BUT NOT YET PROVED.