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In Fig, ABCD is a quadrilateral.(i) Name a pair of adjacent sides.(ii) Name a pair of opposite sides.(iii) How many pairs of adjacent sides are there?(iv) How many pairs of opposite sides are there?(v) Name a pair of adjacent angles.(vi) Name a pair of opposite angles.(vii) How many pairs of adjacent angles are there?(viii) How many pairs of opposite angles are there? |
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Answer» (i) Name a pair of adjacent sides. Adjacent sides are: AB, BC or BC, CD or CD, DA or AD, AB (ii) Name a pair of opposite sides. opposite sides are: AB, CD or BC, DA (iii) How many pairs of adjacent sides are there? Four pairs of adjacent sides i.e. AB BC, BC CD, CD DA and DA AB (iv) How many pairs of opposite sides are there? Two pairs of opposite sides. AB, DC and DA, BC (v) Name a pair of adjacent angles. Four pairs of Adjacent angles are: ∠DAB ∠ABC, ∠ABC ∠BCA, ∠BCA ∠CDA or ∠CDA ∠DAB (vi) Name a pair of opposite angles. Four pair of opposite angles are: ∠DAB ∠BCA and ∠ABC ∠CDA (vii) How many pairs of adjacent angles are there? Four pairs of adjacent angles. ∠DAB ∠ABC, ∠ABC ∠BCA, ∠BCA ∠CDA and ∠CDA ∠DAB (viii) How many pairs of opposite angles are there? Two pairs of opposite angles. ∠DAB ∠BCA and ∠ABC ∠CDA |
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