-Arithmetic is
a branch of math concerned with the basic operations of addition, subtraction,
multiplication, and division of numbers.
-Trigonometry
is the study of mathematical relations between sides and angles.
-One hectare equals (is equal to) 10,000
square meters. -The area of a rectangle = the length x the
width. -The volume of a cylinder = pi x radius
squared x height. -The circumference of a circle =3.14 x
diameter. -The area of a circle= 3.14 x radius
squared. -10% of 1000 equals one hundred. (10% ten
per cent) -The area of a rectangle = the length x the
width. -The sign ≠ means is not equal to. -The sign ≈ means equals
approximately. -The sign // means parallel to. -One third is greater than one fifth. -The ball is spherical in shape. -A ruler is marked with centimeters. -A ruler is used for measuring things. - A ruler is used for drawing straight
lines. -We can draw a right angle by using a
set-square. ----- sums plus minus multiplied by divided by -5 plus 5 equals 10. -4 multiplied by 5 is equal to 20. -A third plus a half equals five sixths. ----- A protractor is
an instrument for measuring angles. -balance/weighing objects -thermometer/measuring temperature -microscope/magnifying objects -compass/drawing circles --------------- Derivations triangle triangular rectangle rectangular circle - circular semicircle semicircular cylinder cylindrical cone conical sphere spherical square square A coin has the shape of a c
. . A ball/A stamp/a pen/a blackboard/a wall
chart --------------- -We can calculate the area of a rectangle by
multiplying the length by the width. |
a parallelogram an equilateral triangle an isosceles triangle an angle a right-angled triangle rectangle square pyramid a cylinder circle cone a line perpendicular (to) base sine cosine tangent cotangent hypotenuse adjacent side opposite
side figure point of intersection intersect sth at parallel to lines: horizontal diagonal curved vertical angles : acute (less than 90) obtuse (more than 90, but less than 180) adjacent (next to each other and add up to
180) reflex (more than 180 but less than
360) exterior interior smaller than greater than A half a third a quarter a fifth
two and three quarters four hundred 3.05: three point naught five - symbol m=meter mm=millimeter km=kilometer g=gram l=liter 5mē (five square meters) 5mģ (five cubic meters) |
Derivation
( 7 ) harm / - ful inform / - ation breath / - e affect / effect addict / - ive mix /
- ture chemistry/ chemical fly / flight ( 8 ) Electricity / electric is attracted / attraction Atoms /atomic a charge / to charge Alternating / alternator (10) triangle triangular rectangle rectangular circle - circular semicircle semicircular cylinder cylindrical cone conical sphere spherical square square |
( 1 ) punctual /
- ity competence /competent devote/ devotion busy /a business motivate / motivating poems /a poet feel nervous / - ly thinking/ thought understand/ - ing ( 2 ) environment / - al pollutant / pollution smells / smelly The North Pole / polar climate / climatic radiate(s) / radiation science/ scientist insect / insecticide Globalization / Global sun / solar A
coin has the shape of a circle. It's -------------. Circular |