Question

Can someone help me find this answer?

Answer 1

Answer:

$m$

Step-by-step explanation:

we know that

In a quadrilateral inscribed in a circle opposite angles are supplementary so

$m$

$m$

Step 1

Find the value of x

substitute the values

$x^{2} +3x=180\\ \\ x^{2} +3x-180=0$

using a graphing tool

solve the quadratic equation

see the attached figure

$x=12\°$

step 2

Find the measure of angle D

$m$

$m$

substitute

$74\°+m$

$m$