2.06 Proving angle relationships
Interactive practice questions
The rays $\overrightarrow{DE}$›‹DE and $\overrightarrow{DF}$›‹DF are opposite rays.
Which of the following are true statements? Select all that apply.
$\overrightarrow{DE}$›‹DE and $\overrightarrow{DF}$›‹DF are the legs of a straight angle
A
$m\angle EDF=180^\circ$m∠EDF=180°
B
$\overrightarrow{DE}$›‹DE and $\overrightarrow{DF}$›‹DF are the legs of a right angle
C
$\overrightarrow{DE}$›‹DE and $\overrightarrow{DF}$›‹DF are not the legs of any angle
D
$m\angle EDF=0^\circ$m∠EDF=0°
E
Medium
< 1min
The rays $\overrightarrow{DE}$›‹DE and $\overrightarrow{DF}$›‹DF are perpendicular to one another.
Medium
< 1min
Given that two angles form a linear pair, which two of the following statements must always be true?
Medium
< 1min
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Outcomes
GEO-G.CO.9
Prove and apply theorems about lines and angles.