Unit 1 : Pythagoras, Trig ratios, Sine and Cosine rule and area od shapes Flashcards
1
Q
Pythagoras theory
A
a^2 + b^2 = c^2
2
Q
Tan
A
opposite/adjacent
3
Q
Cos
A
adjacent/hypotenuse
4
Q
Sin
A
opposite/hypotenuse
5
Q
Sine rule
A
a/SinA = b/SinB = c/SinC
6
Q
What is the sum of exterior angles of any triangle
A
The sum of 2 opposite interior angles
7
Q
What is the sum of interior angles of any triangle
A
180°
8
Q
Trapezium
A
has one pair of parallel sides
9
Q
What is the sum of the interior angles of a parallelogram?
A
360°
10
Q
Interior angles of a polygon
A
(n - 2) x 180
(n = the number of sides the polygon has)
11
Q
The sum of the exterior angles of a polygon
A
360°
12
Q
Area of a kite
A
1/2 (product of diagonals)
13
Q
Area of trapezium
A
(sum of parallel sides) x height /2
14
Q
Area of prism
A
Area of cross section x length
15
Q
Volume of a cone
A
1/3 x π x r^2 x h
