# What is the format of this proof? Given: ∠ABC is a right angle, ∠DBC is a straight angle Prove: ∠ABD is a right angle two-column proof two-paragraph proof flowchart proof one-paragraph proof

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## Question:

What is the format of this proof? Given: ∠ABC is a right angle, ∠DBC is a straight angle Prove: ∠ABD is a right angle two-column proof two-paragraph proof flowchart proof one-paragraph proof

Explanation :

A two-column proof is one common way to organize a proof in geometry.Two-column proof always has two columns where one for statements and one for reasons.

Here, is a right angle and is a straight angle( ) .    (given)

Therefore, must be right angle. ( because, )

Which is the required proof.

Since, In the above proof both statements and reasons both mentioned, therefore, it is the two column proof.

Note: We can also make a table which consist of two columns, in first we can mention ‘statements’ while in second column we can mention ‘reasons’.

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