Chapter 2: Q10. (page 57)
Name the definition or state the theorem that justifies the statement about the diagram.
If , then .
The used definition is the definition of perpendicular lines.
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Tell whether each statement is true or false. Then write converse and tell whether it is true or false.
Statement: If then is not obtuse.
State which postulate, definition, or theorem justifies the statement about the diagram.
Write each biconditional as two conditionals that are converses of each other.
Points are collinear if and only if they all lie in one line.
Tell whether each statement is true or false. Then write converse and tell whether it is true or false.
Statement: If ,then.
It is known that has a supplement, but can’t have a complement. Name one possible measure for .
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