WAEC - Mathematics (2002 - No. 39)

In the diagram, calculate the value of x

35o
80o
100o
115o

Explanation

From the diagram above.

115º = A  (corresponding angles)

t + 115º  = 180° ( sum of <s on a straight line)

t = 180º - 115º = 65º

x = 35º + 65º = 100º ( ext. <s of a triangle = the sum of the two opposite interior <s)

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