Question:
What is PN equal to?
What is PN equal to?
Options:
- a) 3 2 a
- b) 3 2 a
- c) 3 4 a
- d) 3 4 a
- a) 3 2 a
- b) 3 2 a
- c) 3 4 a
- d) 3 4 a
correct answer : b)
Explanation:
P
h
30°
M
45° 60°
NQR x b a
tan 60 ° = h
x Þ h = 3x
tan 45 ° =
h
QN Þ QN = h
tan 30 ° = h
PN
PN = h 3
h + a = h 3
h =
a
31-
=
a() 31
2
+
PN = h 3 = a()33
2
+
P
h
30°
M
45° 60°
NQR x b a
tan 60 ° = h
x Þ h = 3x
tan 45 ° =
h
QN Þ QN = h
tan 30 ° = h
PN
PN = h 3
h + a = h 3
h =
a
31-
=
a() 31
2
+
PN = h 3 = a()33
2
+