Step 1 Step 2 1. Sketch what step 4 and then step 5 would look like. Step 4 Step S 2. How many black triangles are in each step? Step 1 black A = | Step 2 = 4 black A's step 3 = 13 black D's 3. What pattern do you notice? Step 3 Step 4 = 1,4,13.... 4. Write a recursive formula for the number of black triangles based on the step. 5. Write an nth term formula for the number of black triangles based on the step. 6. Use your formula from 5 to find how many black triangle step 14 would have. 7. If a person were to draw each of the first 10 steps, how many total black triangles would there be?