Year 7 - Speedy Math

Exercises 8-10: Algebra, Geometry, Angles

Identify the variable: 4x + 15 + a = 36

4x & a

Identify the like terms: 2s + 3b + 4s + s²

2s & 4s are like terms, but s² is not like to them because variables raised to different powers are not like terms

Identify the angle

Acute angle 1-89^o

Identify the angle

Right angle 90^o

Identify the angle

Obtuse angle

Identify the angle

Straight angle - 180^o

Identify the angle

Reflex angle 181-359^o

Identify the angle

Complete angle OR 360^o

Identify the triangle & describe it’s properties

Equilateral - all sides are equal

Identify the triangle & describe it’s properties

Isosceles - two sides are equal length

Identify the triangle & describe it’s properties

Scalene - all three sides are different lengths

Identify the type of shape and the sum of their interior angles (all of these can be described with one word)

Quadrilaterals - 360^o

Identify the shape and the sum of their interior angles

Triangle - 180^o

Is this a parallel or perpendicular line? Explain why

Parallel - they are side by side and never meet

Is this a parallel or perpendicular line? Explain why

Perpendicular - two straight lines that intersect or cross each other at a right angle (90 degrees)

How do I convert mm → cm?

Divide by 10

How do I convert cm → m?

Divide by 100

How do I convert m → km?

Divide by 1000

How do I convert mL → L?

Divide by 1000

How do I calculate the perimeter of a quadrilateral?

Perimeter = 2L + 2w (units e.g. mm/cm/m/km)

How do I calculate the perimeter of a triangle?

Add all the sides - S1 + S2 + S3 (units e.g. mm/cm/m/km)

How do I find the perimeter of a circle? And what is another name for a circles perimeter?

Perimeter of a circle (Circumference) = 2 x pi x radius (units e.g. mm/cm/m/km)

How do I find the area of a circle?

Area = pie x radius² (units²)

How do I find the area of a square?

Area= Lw

OR Area = S² (units²)

How do I find the area of a rectangle?

Area = Lw (units²)

How do I find the area of a triangle?

Area = (base x height)/ 2 (units²)

How do I calculate the volume of a rectangular prism?

Volume = Area x height (units³)

What type of angle is this? And what rule applies?

Alternate angle/ Z-rule

What type of angle is this? And what rule applies?

Corresponding angle/ F-rule

What type of angle is this? And what rule applies?

Co-interior angle/ C-rule

What type of angle is this? And what rule applies?

Complementary - They add up to 90^o

What type of angle is this? And what rule applies?

Supplementary - They add up to 180^o

What type of angle is this? And what rule applies?

Vertically opposite - creates two sets of identical angles

a=d and b=c

Identify the triangle & describe it’s properties

Right angled triangle - Two lines are perpendicular, creating one 90^o

^angle