Question

87°

A
74°
C
B
What is mZB?
mZB =
O
using Inscribed Quadrilateral Theorem

Answer 1

m<B = 93°

Explanation:

Based on the inscribed quadrilateral theorem, the opposite angles of a cyclic quadrilateral are supplementary.

Thus:

m<B + m<D = 180°

Substitute

m<B + 87° = 180°

m<B = 180° - 87°

m<B = 93°