Angle A and Angle D are congruent because angles of an equilateral triangle are congruent.
Side AD is equal to side AD because of the reflexive property
Side AC is congruent to side DB because components of sides are congruent
Therefore, Triangle ACD is congruent to Triangle DBA
Answer:
( i ) ∠AOB = 72
( ii ) ∠BOC = 67
( iii ) ∠COD = 134
( iv ) ∠AOD = 87
Step-by-step explanation:
Sum of angles in a circle is 360,
a + b + c + x = 360
72 + 67 + 134 + x = 360
273 + x = 360
x = 360 - 273
x = 87
∠AOB = a = 72
∠BOC = b = 67
∠COD = c = 134
∠AOD = x = 87
A is perpendicular to c<span />
