
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given vectors $\overrightarrow {OA} = (2, -3)$, $\overrightarrow {OB} = (-5, 4)$, $\overrightarrow {OC} = (1-\lambda, 3\lambda+2)$:
1. If $\triangle ABC$ is a right-angled triangle and $\angle B$ is the right angle, find the value of the real number $\lambda$.
2. If points A, B, and C can form a triangle, determine the condition that the real number $\lambda$ must satisfy.

Present the answer in LaTex format: \boxed{Your answer}
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