[填空题]
A shaving/makeup mirror is designed to magnify your face by z:ayxt2mhg1h 7v i 2v/a factor of 1.)iyjcyd-,dwnk; t,j : 33 when your face is plac,td ynjiw:c;)yk, d-jed 20.0 cm in front of it.
(a) What type of mirror is it?
(b) Describe the type of image that it makes of your face.
(c) Calculate the required radius of curvature for the mirror. r = cm