**Answer:**

0.333333 repeating

**Step-by-step explanation:**

**Answer:**

1/5, 1/6, 1/7, 1/8,1/9, 1/10,1/11,1/12

**Answer:**

**Step-by-step explanation:**

All the angles in a triangle add up to 180 degrees. Both angles are 36 degrees so that's 72 degrees.

**Answer:**

850

**Step-by-step explanation:**

**Answer:**

The length of the rectangle is 21 inches, the width of the rectangle is 10.5 inches

**Step-by-step explanation:**

Let x inches be the length of the rectangle, then the width of the rectangle is inches.

The perimeter of the rectangle is the sum of all sides' lengths:

Thus,

Hence, the length of the rectangle is 21 inches, the width of the rectangle is 10.5 inches.