Two statements are missing reasons. what reasons can be used to justify both statements 2 and 3 ?

See explanation

Step-by-step explanation:

The given circle has center O.

A, B,C, and D are points on the circumference of the circle.

We want to prove that:

We need to join to B and C as shown in the attachment.

Recall that angle subtended by arc BC at the center is twice the angle subtended at the circumference by the same arc.

This implies that:

The LHS of equation (1) and (2) are equal. Therefore the RHS are also equal.

This implies that:

there is nothing below so i cannot

step-by-step explanation: