Question

Quadrilateral ABCD is inscribed in a circle. Angle B measures 19°. What is the measure of angle D?

Answer 1

Answer:

$D = 161^o$

Step-by-step explanation:

Given

$\angle B = 19^o$

Required

Find D

The label of the quadrilateral are not clear. However, a more complete question illustrates that B and D are opposite sides.

To solve for D, we make use of:

$B + D = 180^o$ ---- opposite $sides$ of a $cyclic$ quadrilateral

Make D the subject

$D = 180^o -B$

$D = 180^o -19^o$

$D = 161^o$