WAEC - Mathematics (2021 - No. 39)
In the diagram, line \(\overline{EC}\) is a diameter of the circle ABCDE.
If angle ABC equals 158°, find ∠ADE
112
90
68
22
คำอธิบาย
In the given diagram;
<EBC = 90º (< in a semi-circle)
< ABE = 158º - 90º = 68º
\(\therefore\) < ADE = 68º ( <s in same segment)