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Maths GCSE :( > Yr 7 > Flashcards

Yr 7 Flashcards

1
Q

Define prime factor

A

A factor which is a prime

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2
Q

What is the product of primes?

A

The prime factors that multiply together to make a number eg. 2250 = 2×3×3×5×5×5 or = 2×3²×5³

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3
Q

What is HCF?

A

The highest common factor
HCF of 12 and 8 is 4

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4
Q

What is LCM?

A

Lowest common multiple
LCM of 12 and 8 is 24

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5
Q

What is a triangle number?

A

Numbers in the form ½n×(n+1)
They form a triangle

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6
Q

How to divide decimals?

A

x/y ×(whatever needed to make numerator an integer)

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7
Q

How to change from a fraction to a decimal?

A

Divide numerator by denominator

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8
Q

How to change from a decimal to a fraction?

A

Use place value then simplify

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9
Q

How to change from percentage to a fraction?

A

Write as fraction over 100 then simplify

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10
Q

What is an arithmetic sequence?

A

Formed by adding or subtracting the same amount each time

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11
Q

What is a geometric sequence?

A

Formed by multiplying or dividing by the same amount each time

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12
Q

What is the sum of internal angles in a triangle?

A

180°

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13
Q

What is the sum of internal angles in a quadrilateral?

A

360°

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14
Q

Sum of angles around a point?

A

360°

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15
Q

Sum of angles on a straight line?

A

180°

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16
Q

What is an angle smaller than 90° called

A

An acute angle?

17
Q

What is an angle between 90° and 180° called?

A

An obtuse angle

18
Q

What is an angle between 180 and 360° called?

A

A reflex angle

19
Q

What is a 90° angle called?

A

A right angle

20
Q

What are vertically opposite angles?

A

\/
-> /\ <- those angles are equal

21
Q

What are alternate angles?

A

‘Z’angles
Are equal

22
Q

What are corresponding angles?

A

‘F’angles
Are equal

23
Q

What is an equaliateral triangle?

A

All internal angles are 60°
All side lengths are equal?

24
Q

What is a scalene triangle?

A

All angles and side lengths are different

25
Q

What is an isosceles triangle?

A

Base angles are equal
2 sides are equal length

26
Q

What is a right angled triangle?

A
  • a triangle where one angle is 90°
  • can be scalene or isosceles
27
Q

Look at your year 7 book for bisectors and constructions I beg

A

I can’t be arsed

28
Q

What is probability?

A

The chance a given event will occur

29
Q

How is probability expressed?

A

Between 0 and 1

30
Q

How to calculate probability?

A

Number of ways an outcome can happen
____________________________________

Total number of possible outcomes

31
Q

What is a face

A

A side of the shape

32
Q

What is an edge 😰😰😰

A

The lines of a shape that make up the skeleton

33
Q

What is a vertex?

A

Where the edges meet (corners)

Maths GCSE :( (7 decks)

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