Geometry

ANGLES


rightangleRIGHT ANGLE
a right angle is 90°

acuteACUTE ANGLE
an acute angle is less than 90°

obtuseOBTUSE ANGLE
an obtuse angle is more than 90°but less than 180°

straightSTRAIGHT LINE
a straight line is 180°

 


complimentary
COMPLEMENTARY ANGLES
complementary angles add up to 90°

supplementary
SUPPLEMENTARY ANGLES
supplementary angles add up to 180°

circle
CIRCLE
a circle is 360°


TRIANGLES

triangleTRIANGLE
The angles in a triangle always add up to 180°


equilateralEQUILATERAL TRIANGLE Equilateral triangles have 3 equal sides and 3 equal angles of 60°

isoscelesISOSCELES TRIANGLE Isosceles triangles have 2 sides of equal length and 2 angles of equal degrees

scaleneSCALENE TRIANGLE
Scalene triangles have no equal sides and no equal angles


AREA

rectangle
RECTANGLE
Area = b × h


triangleareaTRIANGLE
Area = b × h
             2

parallelogramPARALLELOGRAM
Area = b × h

trapezium     TRAPEZIUM

circleareaCIRCLE
Circumference = πD
Area = πr2


SOLIDS

cuboid
CUBOID


cylinder            CYLINDER

pyramid          PYRAMID

sphere             SPHERE

cone               CONE