Need To Know

Question 1

Calculate frequency density

Answer 1

Frequency / class width

Question 2

Equation for finding the arc

Answer 2

Arc = theta / 360 x pi x d

Question 3

Equation for area of a sector

Answer 3

Area = theta / 360 x pi x r²

Question 4

How to find the Area Scale Factor…

Answer 4

Square the length scale factor!

Question 5

Find the Volume Scale Factor

Answer 5

Cube the length scale Factor

Question 6

What are the 3 conditions of congruency?

Answer 6

SAS
ASA
SSS
RHS

Question 7

Sine rule to find sides

Answer 7

a / SinA = b / SinB = c / SinC

Question 8

Some rule to find angles

Answer 8

SinA / a = SinB / b = SinC / c

Question 9

Cosine rule

Answer 9

a² = b² + c² - 2 x b x c x cosA

Question 10

Area of triangle equation

Answer 10

Area = 1/2 x a x b x SinC

Question 11

Which direction do you measure bearings?

Answer 11

Measured closcwise
Measured from north

Question 12

Circle theorem about the arrow head

Answer 12

Angle at the centre is twice the angle at the circumference

Question 13

Circle theorem for a triangle drawn with the diameter

Answer 13

The angle in a cemivircle is 90 degrees

Question 14

Circle theorem for the bow tie shame

Answer 14

Angles in the same segment are equal

Question 15

Circle theorem for a quadrilateral in a circle

Answer 15

Opposite angles in a cyclic quadrilateral add to 180 degrees

Question 16

How do you plot a cumulative frequency graph

Answer 16

With the cumulative frequency points
With the upper bounds
Curved line