Plane Figures

Triangles

acute-angled triangle

equilateral triangle

isosceles triangle obtuse-angled triangle

isosceles right-angled triangle

right-angled triangle

Quadrilaterals

Square Rectangle Parallelogram Trapezium

Kite Rhombus Cyclic Quadrilateral

Polygons

Convex Polygon Concave Polygon

Hendecagon

Polygons

Triangle Quadrilateral Pentagon Hexagon

Hexadecagon

Octagon DecagonNonagonHeptagon

Icosagon

3

16 20

Dodecagon

1211

10987

654

Regular Polygons

3-D Figures

3-D Figures

pyramid

prism

(prism)cuboid

cube(prism)

cone frustum

sphere hemisphere

cylinder

Regular PolyhedraTetrahedron

F = 4

V = 4

E = 6

Octahedron

F = 8

V = 6

E = 12

Cube

F = 6

V = 8

E = 12

Dodecahedron

F = 12

V = 20

E = 30

Icosahedron

F = 20

V = 12

E = 30

Circle

Centre, Radius, Circumference

O

circumference

radius

Centre

Chord

O

diameter

O

chord

Arc arc AB (minor arc)

semi-circle arc AXB (major arc)

A

B

X

Angle at Centre

O

AP

BAOB is an angle at the centre subtended by the arc APB (or chord AB)

Angle at Circumference

APB is an angle at the circumference subtended by the arc AB (or chord AB)

O

A B

P

Sector

minor sector AOB

major sector AOB

semi-circle

Segment

segment AQB(minor segment)

segment APB(major segment)

semi-circle

Concyclic Points

A, B, C, D and E are concyclic

A

C

B

D

E

Cyclic Quadrilateral

ABCD is a cyclic quadrilateral

A

CB

D

Tangent

point of contact

secant

tangent

Centres of a Triangle

Centroid

C

median

Circumcentre

P

Perpendicularbisector

Circumcentre

P

circumscribedcircle

Incentre

I

angle bisector

Incentre

I

inscribed circle

Orthocentre

O

altitude

Centres of a Triangle

C

P

I

O

Centroid Incentre

Circumcentre Orthocentre

Median Angle Bisector

Perpendicular Bisector

Altitude