Slide 2:
LINES AND PLANES IN 3D IMPORTANT NOTES :
SKETCH the right- angled
triangle
2. Identify the angle and name it Angle between a line and a plane
Angle between two planes
Slide 3:
Look at c, choose Which
One is the Nearest to C
(slashed alphabet) Look at the diagram Look at C,
Choose W O N
(Non-slashed alphabets) Arrange the line and plane in two rows Write C in the first box Find out the same alphabet C Draw 3 boxes A D C B G H F E C E
E F G H E G C E G Look at the line and the plane in the diagram Which one?? Tan ?= 6
v72 ?= 35.26° Name the angle between the line CE and the Plane EFGH LINES AND PLANES IN 3-D [paper 2] 6 6 6
Slide 4:
Write K in the first box Look at K, choose W O N
Slashed- alphabet Look at the diagram Look at K, choose W O N
Non-slashed alphabets Slash the same alphabet Look at the diagram Which one?? D G K
D E F G Which one?? Look at the diagram D H F E K G 6 M N 12 8 N K M Tan ?= 6
12 ?= 26.57° K K N M DK = GK
So, choose the midpoint of DG EK = FK
choose M Name the angle between the plane DGK and the base DEFG LINES AND PLANES IN 3-D [paper 2]
Slide 5:
8 6 10 D V C Which one?? which one?? A B Calculate the angle between the plane AVC and the plane BVC A V C
B V C A B C ?= Tan ? = 10
8 51.34°
Slide 6:
A E G H D C B F Name the angle between the plane ACGE with the plane DCGH A C G E
D C G H A C D between A & E, choose either one and write
the alphabet in the first box ( for rectangle only) Which one Which one
Slide 7:
H E U G T L M N R F P Answer : URT Name the angle between the plane LUM
with the plane LPNM
Slide 8:
Find the angle between the plane JFE and the plane DEF. M 5 5 13 5 5
Slide 9:
M L E D 13 5 5 F J 5 Identify the angle
Slide 10:
< JMD = 22.62
or
22°37' Tan JMD = 5
v13² - 5²