Identify whether the conclusion was a result of induction or deduction. Write D if it is Deductive and I if it is Inductive on the space provided. 1. A quadrilateral has four sides.
A rectangle has four sides.
A rectangle is a quadrilateral.

2. If an angle is obtuse, then it cannot be acute.
3. If 3, 6, 9 and 12 are the first four terms, then 15 is the fifth term.
4. Ray is to an angle as side is to a triangle.
5. Trees can be found in a forest.
Birds live on trees.
Therefore, birds can be found in a forest.
6. If 3:6, 6:18 and 12:54, then 24:162
7. All animals are mortal.
All humans are animals.
Therefore, all humans are mortal.
8. If a polygon has five sides, then it is a pentagon.
9. All trees are plants.
All acacia are trees.
Thus, all acacia are plants.
10. If a number is divisible by 2, then it is even.