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WAEC - Mathematics (1993 - No. 23)
Two chords PQ and RS of a circle when produced meet at K. If ∠KPS = 31
o
and ∠PKR = 42
o
, find ∠KQR
11
o
73
o
107
o
138
o
149
o
Paliwanag
QPS - QRK = 31
o
QRK + RKQ + KQR = 180
31 + 42 + KQR = 180
o
KQR = 180 - 73 = 107
o
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