∠PMA=55°
Step-by-step explanation:
see the attached figure with the letter X to better understand the problem
we know that
In the right triangle PXM
PX=LA=25 cm
XM=AM-15/2=25-7.5=17.5 cm
∠PMA=∠PMX
tan(∠PMA)=(PX)/(XM)
tan(∠PMA)=(25)/(17.5)
∠PMA=arctan((25)/(17.5))=55°
![3. determine the angle pma of the lampshade. 15 cm- 25 cm -25 cm.- m](/tpl/images/0052/9071/f9255.jpg)