1. Force (F) is the product of the mass (m) of a body and its acceleration (a).   Hint Hint       2. The sum of the magnitude of the interior angles (A) of a convex polygon divided by 180 equals the number of sides (s) decreased by 2.   Hint       3. Perimeter (P) of an equilateral triangle is thrice the length of a side (a) of the triangle.   Hint       4. The square of the hypotenuse (c) in a right-angled triangle equals the sum of the squares of the lengths of the other two sides (a and b).   Hint       5. Circumference (C) of a circle is (22/7) times the diameter (d).   Hint       6. Distance traveled (s) is the product of speed (u) and time (t).   Hint       7. Temperature in Fahrenheit (F) decreased by 32 equals 1.8 times the temperature in Celsius (C).   Hint