Equations

Question 1

Area of Triangle with Sin ?

Answer 1

1/2b x aSinC
or
1/2b x cSinA
or
1/2a x cSinB

Question 2

Area of Sector ?

Answer 2

𝜃/360o x 𝜋 x r^2

Question 3

Quadratic Formula ?

Answer 3

Question 4

Cosine Rule ( for side ) ?

Answer 4

a^2 = b^2 + c^2 - ( 2bc x cosA )

Question 5

Cosine rule ( angle ) ?

Answer 5

Question 6

Sin Rule ( For side ) ?

Answer 6

a/SinA = b/SinB = c/SinC

Question 7

Sin Rule ( For angle ) ?

Answer 7

SinA/a = SinB/b = SinC/c

Question 8

What are the equations in trigonometry ?

Answer 8

Soh, Cah, Toa

Question 9

Pythagoras theorem ?

Answer 9

a^2 + b^2 = c^2

Question 10

What is interpolation ?

Answer 10

Using a line of best fit to estimate the value that lies within the data range

Question 11

What is extrapolation ?

Answer 11

Using a line of best fit to estimate the value that live outside of the data range

Question 12

What is positive, negative and none correlation ?

Answer 12

Positive - that’s one value increases, the other also increases

Negative - as one value increases, the other value decreases

None - there is no link between the data

Question 13

What is the circle graph equation ?

Answer 13

x^2 + y^2 = r^2

Question 14

What is the equation for speed ?

Answer 14

S = D/T

Question 15

What is the equation for density ?

Answer 15

D = m/v

Question 16

What is the equation for pressure ?

Answer 16

P = F/a

Question 17

What is the equation to calculate area of triangle ?

Answer 17

1/2 x b x h

Question 18

What is the equation to calculate area of parallelogram ?

Answer 18

Area = b x h

Question 19

What is the equation to calculate the area of a trapezium ?

Answer 19

Area = 1/2( a + b ) x h

Question 20

Do you know units of area and volume conversion ?