chapter 4;right-angled triangles Flashcards
1
Q
Pythagoras theorem-finding the hypotenuse
A
h squared=a squared+ b squared
2
Q
finding the length of the hypotenuse
A
eg. 9 squared + 5 squared
square root the two
=10.30cm
3
Q
finding the length of a shorter side
A
eg. 12 squared = x squared + 5 squared
x squared= 12 squared - 5 squared
square root
=10.9mm
4
Q
sin
A
opposite/hypotenuse = SOH
5
Q
cos
A
adjacent/hypotenuse=CAH
6
Q
tan
A
opposite/adjacent=TOA
7
Q
unknown angle
A
(……)
8
Q
unknown side
A
eg. 20 times tan35 degrees
9
Q
angle of elevation
A
up
10
Q
angle of depression
A
down
