Math

Question 1

Ratio

Answer 1

An amount compared to another amount using : symbol

Question 2

Simplify

Answer 2

Divide all parts of the ratio by a common factor

Question 3

Direct proportion

Answer 3

2 or more quantities are in direct proportion if when one increases or decreases so does the other with the ratio of the quantities staying the same

Question 4

Unitary method

Answer 4

Solving direct proportion problems by 1st calculating the value of a single item

Question 5

At random

Answer 5

Describes a situation where the outcomes are equally likely

Question 6

Mutually exclusive

Answer 6

2 outcomes are mutually exclusive if they can’t happen at the same time

Question 7

Experimental probability

Answer 7

A probability estimated from data collected in an experiment

Question 8

Theoretical probability

Answer 8

A probability found using equally likely outcomes

Question 9

What’s the formula for the probability that an outcome doesn’t happen?

Answer 9

The probability that it doesn’t happen = 1 - p

Question 10

Equally likely outcomes

Answer 10

When each outcome of an experiment occurs with equal probability

Question 11

How can we find the number of possible outcomes?

Answer 11

Total number of equally likely outcomes = no. of outcomes of 1st item x no. of outcomes of 2nd item x …

Question 12

What is the formula for relative frequency in probability?

Answer 12

Relative frequency = frequency / total throws

Question 13

Why is repeating an experiment more reliable than repeating it for less times?

Answer 13

Because you will get better estimates of probabilities

Question 14

Transform

Answer 14

Move a shape by reflection, rotation or translation; change a shape enlargement

Question 15

Object

Answer 15

A shape before a transformation

Question 16

Image

Answer 16

A shape after a transformation

Question 17

Reflect

Answer 17

Transform a shape, producing the mirror image of that shape

Question 18

Translate

Answer 18

Transform a shape by moving each part of the shape the same distance in the same direction

Question 19

Rotate

Answer 19

Transform a shape, moving or turning each point of the shape around a fixed position through the same angle

Question 20

Enlargement

Answer 20

A transformation that increases the size of a shape to produce a mathematically similar image

Question 21

Combination of transformations

Answer 21

2 or more transformations carried out one after another

Question 22

Scale factor

Answer 22

The ratio by which a length is increased

Question 23

Centre of enlargement

Answer 23

The fixed point of an enlargement

Question 24

pi

Answer 24

A mathematical constant approximately 3.14

Question 25

Perpendicular height

Answer 25

The height of a shape or object measured at 90° to it's base

Question 26

Compound shape (or composite shape)

Answer 26

A shape made up of simpler shapes

Question 27

What is the formula for the area of a triangle?

Answer 27

A = 1/2 bh

Question 28

What does b stand for in area?

Answer 28

Base

Question 29

What does h stand for in area?

Answer 29

Height

Question 30

What height do we use to find the area of a triangle, parallelogram and trapezium?

Answer 30

The perpendicular height

Question 31

What is the formula for the area of a parallelogram?

Answer 31

A = bh

Question 32

What is the formula for the area of a trapezium?

Answer 32

A = 1/2(a + b)h

Question 33

What is the plural word for trapezium?

Answer 33

Trapezia

Question 34

What is the formula for the circumference of a circle if we are given the diameter?

Answer 34

C = πd

Question 35

What is the formula for the circumference of a circle if we are given the radius?

Answer 35

C = 2πr

Question 36

What is the formula for the circumference of a semicircle?

Answer 36

C = 1/2πd + d

Question 37

What is the formula for the circumference of a quarter circle?

Answer 37

C = 1/4(2πr)

Question 38

What is the formula for the area of a circle?

Answer 38

A = πr²

Question 39

What is the formula for the area of a semicircle?

Answer 39

A = 1/2(πr²)

Question 40

What is the formula for the area of a quarter circle?

Answer 40

A = πr² /4

Question 41

How do we find the area of compound shapes?

Answer 41

- Divide the shape into simple shapes - Work out the area of each simple shape - Add or subtract the area of the simple shape to get the area we need

Question 42

What is the formula for the volume of cuboids?

Answer 42

V = lwh

Question 43

What is the formula for the surface area of cuboids?

Answer 43

SA = 2lw + 2lh + 2wh

Question 44

Circumference of a circle/perimeter or the circle

Answer 44

A line made up of points that are the same distance from the center

Question 45

Radius of a circle

Answer 45

A line that joins the center of a circle to any point or the circumference

Question 46

Diameter of a circle

Answer 46

A line that joins two points of the circumference. It's 2x the radius

Question 47

Arc

Answer 47

Part of the circumference

Question 48

The sector of a circle

Answer 48

The area enclosed between two radii and an arc

Question 49

Chord

Answer 49

A line segment that joins 2 points on the circumference of a circle

Question 50

Segment

Answer 50

An area enclosed between a chord and arc