This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

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Answer
90^\circ$.
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Here are the steps to solve the problems:
: Prove that
Step 1: Analyze the diagram and identify relevant triangles. From the diagram, we can identify two main triangles: and . The right angle symbol at B on the line AC indicates that DB is perpendicular to AC, so . The right angle symbol at P on the line AD indicates that PB is perpendicular to AD, so . However
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Welcome back — been a while! Let's pick up where you left off. Here are the steps to solve the problems: Problem 1: Prove that p = (k x)/( y + y ) Step 1: Analyze the diagram and identify relevant triangles.
This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.