Question

From the figure given below,prove that: 1+2+3+4+5+6​

Answer 1

Step-by-step explanation:

Where is the figure? I need the figure to understand the question

Answer 2

Answer:

1+2+3+4+5+6

3+3+4+5+6

6+4+5+6

10+5+6

15+6

21 answer