### All SAT Math Resources

## Example Questions

### Example Question #1 : Triangles

Two sides of an isosceles triangle are 20 and 30. What is the difference of the largest and the smallest possible perimeters?

**Possible Answers:**

0

10

30

The answer cannot be determined

15

**Correct answer:**

10

Explanation:

The trick here is that we don't know which is the repeated side. Our possible triangles are therefore 20 + 20 + 30 = 70 or 30 + 30 + 20 = 80. The difference is therefore 80 – 70 or 10.

### All SAT Math Resources

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