TRIGONOMETRY FORMULAS SHEET THE RIGHT TRIANGLE RIGHT TRIANGLE THE INTERIOR ANGLES MUST BE 90 SUM OF TRIGONOMETRIC FUNCTIONS PYTHAGOREAN THEOREM LENGTH THE SIDE OPPOSITE ADJACENT HYPOTENUSE CALCULATED YOU CAN ACTUALLY FIND THIRD SIDE THE OTHER TWO INTERIOR ANGLES NUMBER VERTICES CLOSED THE FOURTH SHAPE GRADE PERCENT GRADE THE GRADE CONVERTING AREA FIELD IF YOU DEALING THE UNIT SQUARE SCALE THE MAP PROPER OF 1 MEASURE OF 7 SQUARE INCHES TOTAL HAVE TO MULTIPLY THE FIELD WIDTH THE ACTUAL EQUAL TO ACRE