Page 119 - Maths Skill - 3

Geometry 117

MIND MAP

Geometry Solid Shapes

Elementary Things Shapes and Properties CUBE

1. POINT TRIANGLE A Vertex
A Point It has: Vertex
Denoted by a point (dot) (i) 3 sides Side Face Edge
2. LINE SEGMENT (ii) 3 vertices B C
P Q SQUARE 6 faces

denoted by PQ D C 12 edges
Side Vertex 8 vertices
(i) has two points A Here, every face is square
(ii) has finite length B
(i) It has four sides
3. LINE AB = BC = CD = DA
P Q (ii) It has four vertices CUBOID
denoted by PQ RECTANGLE Vertex
(i) has two points Vertex
(ii) has infinite length A Side B Face
4. RAY D C Edge
P Q (i) It has four vertices 6 faces

denoted by PQ (ii) It has four sides 12 edges
(i) has two points, i.e. AB = CD and AD = BC 8 vertices
one is fixed CIRCLE Here, every face is rectangle
(ii) has infinite length Here Radius
OA radius B O A
AB diameter Centre CONE
O Centre Vertex
Diameter = 2 × radius Curved Face
Symmetry
Plane Face Edge
Line of When a given figure can be divided 2 faces

symmetry into two equal halves then the figure 1 edge
is called symmetrical. 1 vertex