Maths Test 30/3/23 Flashcards
Scalene
no equal lengths/angles
Alternate angles (z)
equal
Corresponding angles (F)
equal
Vertically opposite angles (x)
equal
Co-interior angles (C)
sum to 180
Angles on a straight line
sum to 180
sum of interior angles=
(n-2) times 180
number of sides=
sum of interior angles/180+2 (inverse operation)
Exterior angles in any polygon
sum to 360
number of sides in a regular polygon
360/ exterior angle or interior angle
θ
Theta (angle)
Hypotenuse
opposite the right angle
Opposite
opposite the included angle
Adjacent
Located between the right angle and the included angle.
sin=
sin(θ) opposite/hypotenuse
cos=
(θ) adjacent/hypotenuse
tan=
tan(θ) opposite/adjacent
What do you have to do in trigonometry when finding angles?
change sin, cos and tan to the power of -1 by pressing shift first on your calculator.
arc length equation
θ/360 x d
area of trapezium equation
0.5(a+b) x h