The pair of angles x° and (180 – x)° are called ……………… angles.
The pair of angles x° and (180 – x)° are called ……………… angles.
A) supplementary
B) linear pair
C) complementary
D) reflex
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Correct option is (A) supplementary
\(\because\) \(x^\circ+(180-x)^\circ=(x+180-x)^\circ=180^\circ\)
\(\because\) Sum of angles \(x^\circ\;\&\;(180-x)^\circ\) is \(180^\circ.\)
\(\therefore\) \(x^\circ\;\&\;(180-x)^\circ\) are supplementary angles to each other.
\(\therefore\) The pair of angles \(x^\circ\) and \((180-x)^\circ\) are called supplementary angles.
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