WAEC - Mathematics (2014 - No. 42)

In the diagram, PQR is a straight line, (m + n) = 120^o and (n + r) = 100^o. Find (m + r)

110^o

120^o

140^o

160^o

Explanation

if m + n = 120^o and n + r = 100^o

then m + n = 120^o

then r = 180^o - 120^o = 60^o

also n + r = 100^o

m = 180^o = 80^o

m + r is = 80^o + 60^o

= 140^o

WAEC - Mathematics (2014 - No. 42)

Explanation

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