perimeter
محيط
Perimeter is the distance around the edges of a figure. For example, the perimeter of a square with side length of a is a+a+a+a=4 times a

perpendicular
عمود
When two lines are perpendicular, they are at right angles (90 degrees)

pi
(عدد)پي(نسبت محيط دايره به قطر آن که اين نسبت در تمام دايره ها مساوي و تقريبا" برابر 3.14159 است.)
Pi is the ratio of the circumference of a circle to the diameter of a circle (this ratio is the same for any size circle). Pi is roughly equal to 3.14159

pie chart
نمودار دايره اي
A pie chart (also called a circle graph) is a diagram that is useful for displaying information about the percentages or parts of a whole

point
نقطه
A point is an exact location, a spot with no width or thickness

polygon
شکل چند گوشه، کثير الاضلاع
A polygon is a many-sided figure with straight edges

polyhedron
شکل داراي وجوه متعدد(معمولا" بيش از شش سطح رامي گويند.)
Polyhedra are solids whose faces are polygons

.....2,3,5,7,11,13,17

prime number
عدد اول
A prime number is a positive number that has exactly two factors, 1 and itself. Alternatively, you can think of a prime number as a number greater than one that is not the product of smaller numbers. For example, 13 is a prime number because it can only be divided evenly by 1 and 13. For another example, 14 is not a prime number because it can be divided evenly by 1, 2, 7, and 14. The number one is not a prime number because it has only one factor, 1 itself

protractor
نقاله
A protractor is a device that measures angles

pyramid
هرم
A pyramid is a shape that has a flat polygonal base and triangular sides that meet at a point on the top. The pyramids in Egypt are huge buildings build by ancient Egyptians

quadrilateral
چهار ضلعي
A quadrilateral is a four-sided figure. The square, rectangle, rhombus, trapezoid, kite, and parallelogram are quadrilaterals

quotient
خارج قسمت
The quotient is the answer in long division. The dividend divided by the divisor is the quotient (plus a remainder)

radius
شعاع
The radius is the distance from the center of a circle (or a sphere) to the edge

1/2

ratio
نسبت
A ratio is the relationship between two numbers, as defined by the result you get when you divide one by the other

rectangle
مستطيل
A rectangle is a four-sided figure whose sides are at right angles to each other

remainder
باقي مانده
The remainder is the fractional part of the answer in long division. The dividend divided by the divisor is the quotient plus the remainder

rhombus
متوازي الاضلاع
A rhombus is a parallelogram with equal-length sides

right angle
زاويه قائمه
A right angle looks like the corner of a square; it extends ninety degrees

right triangle
مثلث قائم الزاويه

A right triangle has one angle that is a right angle (extending 90 degrees)

Roman numerals
اعداد رومي
Thousands of years ago, in ancient Rome, the Romans used a system of numbers that we call Roman numerals. In this system, I=1. V=5, X=10, L=50, C=100, D=500, and M=1,000

scalene triangle
مثلث مختلف الاضلاع
The sides of a scalene triangle are all different lengths

second
دومين
The second person or item comes after the first and before the third

semicircle
نيم دايره
A semicircle is half a circle

seven
هفت
There are seven days in the week

shapes
شکل
Everything has a shape

six
شش
Insects have six legs

sphere
کره
A sphere is a ball-shaped object

square
مربع
A square has four, equally long sides which are at right angles to each other

star
ستاره
A star is a shape that has many points

0=1-1

2=5-3

subtraction
تفريق
Subtraction is the operation of taking one number away from another

tally marks
يک روش سريع قرار دادن اعداد در گروه هاي پنج تايي
Tally marks are a quick way of keeping track of numbers in groups of five. One vertical line is made for each of the first four numbers; the fifth number is represented by a diagonal line across the previous four

ten
ده
People have ten fingers and ten toes

tetrahedron
چهار وجهي
A tetrahedron is a pyramid formed by four triangles

third
سومين
The third person or item comes after the first and second

13
******
*******

thirteen
سيزده
Thirteen is the number after twelve (12) and before fourteen (14)

30
**********
**********
**********
thirty
سي
Thiry is the number after twenty nine (29) and before thirty one (31)

1,000

thousand
هزار
One thousand is a whole number that is equal to 100 times 10

three
سه
Three is the number between 2 and 4. A tricycle has three wheels. A triangle has three sides. A Triceratops has three horns. Tri means three