WAEC - Mathematics (2020 - No. 41)
In the diagram, O is the center of the circle. \(\overline{PQ}\) and \(\overline{RS}\) are tangents to the circle. Find the value of (M + N).
120\(^o\)
90\(^o\)
75\(^o\)
60\(^o\)
Vysvětlení
m + n + 90\(^o\) + 180\(^o\) (sum of angle in a \(\triangle\))
m + n = 180\(^o\) - 90\(^o\)
m + n =90\(^o\)