Maths Exam 29 Dec

Question 1

What is a line

Answer 1

A line is made up of an infinite
number of points that go on forever in both directions. It does not have a beginning
or an endpoint.

Question 2

What is a straight line

Answer 2

A straight line is the shortest distance
between two points. It can go on infinitely in
both directions.

Question 3

What is a ray

Answer 3

A ray has one endpoint.

Question 4

What is a line segment

Answer 4

A line segment has two endpoints.

Question 5

How does an angle form

Answer 5

When two straight lines meet an

angle is formed.

Question 6

What is a vertex

Answer 6

The two straight lines are called arms and the point at which they meet is called the vertex.

Question 7

What is an angle

Answer 7

The rotation of an arm around a point, measured in degrees

Question 8

What is an acute angle

Answer 8

An angle smaller than 90°

Question 9

What is a right angle

Answer 9

An angle that is 90°

Question 10

What is an obtuse angle

Answer 10

It is grater than 90°

Question 11

What is a straight angle

Answer 11

It is 180°

Question 12

What is a reflex angle

Answer 12

It’s greater than 180° but smaller than 360°

Question 13

What is a revolution

Answer 13

Its 360°

Question 14

If the sum of two angles = 180° they are

Answer 14

Supplementary angles

Question 15

If the sum of two angles = 90° they are

Answer 15

Complementary angles

Question 16

What are 2 things that adjacent angles have in common

Answer 16

Adjacent angles are angles that are next
to each other so that they have a
common vertex and a common arm.

Question 17

When are angles perpendicular

Answer 17

Two lines are said to be perpendicular when they meet at an angle of 90° (a right angle).

Question 18

How do you multiply decimals by decimals

Answer 18

Remove the decimal commas and multiply the numbers as you would normally (you may need to use long multiplication if the numbers are big). Now count the number of digits after the decimal commas in the question. This will be the number of digits after the decimal comma in the answer.

Question 19

what MUST you do when dividing decimal fractions

Answer 19

When dividing decimal fractions, the number we are dividing by (the divisor) MUST be made into a whole number. We do this by multiplying BOTH numbers by 10, 100 or 1 000. This won’t change our answer because we are multiplying both numbers by the same amount.

Question 20

What does Percent mean

Answer 20

Percentage means parts of a hundred.

Question 21

How do you work out Percentage increase or decrease

Answer 21

Difference 100
```````````````````````````````` × ```````
Original amount 1

Question 22

What is a ratio

Answer 22

A ratio is a comparison between 2 or more values of the same kind. It is a fraction which is recorded as a ratio.

Question 23

What is a rate

Answer 23

Rate is when we compare two or more values with different units of measurement.

Question 24

What is a polygon

Answer 24

A polygon is a two-dimensional shape, enclosed by three or more straight sides.
A triangle is a polygon with three straight sides.

Question 25

Give an example of a polygon

Answer 25

A triangle is a polygon with three straight sides.

Question 26

What is an algebraic expression

Answer 26

An algebraic expression is made up of terms separated by
+ and - signs. The terms are made up of constants and
variables. Expressions can only be simplified by adding the like terms or by multiplying.

Question 27

What is an algebraic equation

Answer 27

An equation has two expressions that equal each other. We use these expressions to solve for the variable so that the LHS of the equation equals the RHS

Question 28

What is a polygon

Answer 28

A two-dimensional (2D) shape is flat but has a base and a height and encloses an area.

Question 29

What is a regular polygon

Answer 29

A regular polygon is a 2D shape with sides of equal length and interior angles the
same size.

Question 30

What is an irregular polygon

Answer 30

If all the sides of a 2D shape are not equal in length, then it is an irregular
polygon.

Question 31

What is a list of numbers forming a pattern called

Answer 31

A list of numbers forming a pattern is called a sequence.