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13.  Fill in the blanks:    

          (i) If two angles are complementary, then the sum of their measures is _______.

            (ii) If two angles are supplementary, then the sum of their measures is ______.

            (iii) Two angles forming a linear pair are _______________.

            (iv) If two adjacent angles are supplementary, they form a ___________.

            (v) If two lines intersect at a point, then the vertically opposite angles are always _____________.

            (vi) If two lines intersect at a point, and if one pair of vertically opposite angles are acute angles, then the other pair of vertically opposite angles are  __________.

Answers (1)

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(i)     90^{\circ}

(ii)    180^{\circ}

(iii)   Supplementary angles

(iv)   Straight line

(v)     equal

(vi)   obtuse angles (as they form a line).

Posted by

Sanket Gandhi

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