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area of quadrilateral=ab+bc+cd+da.therefore, 7+6+12+15=35

1/2 is a rational number that does not lie between -2/5 and -1/5

Rectangle :

Area = lb

Perimeter = 2(l+b)

Square :

Area = a×a

Perimeter = 4a

Parallelogram

Area = l × h

Perimeter = 2(l+b)

Triangle :

Area =b×h/2 or √s(s-a)(s-b)(s-c)…………….where s=a+b+c/2

Right angle Triangle :

Area =1/2(bh)

Perimeter = b+h+d

Isosceles right angle triangle :

Area = ½. a2

Perimeter = 2a+d……………………….where d=a√2

Equilateral Triangle :

Area = √3. a2/4 or ½(ah)….where h = √3/2

Perimeter = 3a

Trapezium :

Area = 1/2h(a+b)

Perimeter = Sum of all sides

Rhombus :

Area = d1 × d2/2

Perimeter = 4l

Quadrilateral

Area =1/2 × Diagonal × (Sum of offsets)

Kite :

Area = d1×d2/2

Perimeter = 2 × Sum on non-adjacent sides

Circle :

Area = πr^2 or πd^2/4

Circumference =2πr or πd

Area of sector of a circle = (θπr^2 )/360

Frustum :

Curved surface area = πh(r1+r2)

Surface area= π( r12+ h(r1+r2) + r22)

Cube :

Volume: V = l3

Lateral surface area = 4a2

Surface Area: S = 6s2

Diagonal (d) = √3l

Cuboid :

Volume of cuboid: lbh

Total surface area = 2 (lb + bh + hl) or 6l2

Length of diagonal =√(l^2+b^2+h^2)

Right Circular Cylinder :

Volume of Cylinder = π r2h

Lateral Surface Area (LSA or CSA) = 2π r h

Total Surface Area = TSA = 2 π r (r + h)

Volume of hollow cylinder = π r h(R2– r2)

Right Circular cone :

Volume = 1/3 π r2h

Curved surface area: CSA= π r l

Total surface area = TSA = πr(r + l )

Sphere

Volume: V = 4/3 πr3

Surface Area: S = 4πr2

Hemisphere :

Volume = 2/3 π r3

Curved surface area(CSA) = 2 π r2

Total surface area = TSA = 3 π r2

Prism :

Volume = Base area x h

Lateral Surface area = perimeter of the base x h

Pyramid:

Volume of a right pyramid = (1/3) × area of the base × height.

Area of the lateral faces of a right pyramid = (1/2) × perimeter of the base x slant height.

Area of whole surface of a right pyramid = area of the lateral faces + area of the base.

Tetrahedron :

Area of its slant sides =3a2√3/4

Area of its whole surface = √3a2

Volume of the tetrahedron = (√2/12)a3

Regular Hexagon :

Area = 3√3 a2/ 2

Perimeter = 6a

Some other Formula :

Area of Pathway running across the middle of a rectangle = w(l+b-w)

Perimeter of Pathway around a rectangle field = 2(l+b+4w)

Area of Pathway around a rectangle field =2w(l+b+2w)

Perimeter of Pathway inside a rectangle field =2(l+b-4w)

Area of Pathway inside a rectangle field =2w(l+b-2w)

Area of four walls = 2h(l+

Given :3 added to a number gives 5Let the number be xNow 3+x=5x=5-3=2Thus x=2

The denominators are same

Theta=60°sin60°=√3/2cos60°= 1/2(√3/2)^2-2(1/2)+1/4(3/4)-1+(1/4)=0

1407309 it is the answer of Fourteen lakh seven thousand three hundred nine

6 is the best way for answer

2x=÷7=6 is the correct answer

m=3 is the right answer

4.132343567809876573864334097...

3(2x+5)=5(2x-5) 6x+15 =10x-25 40=4xx=10 The value of x is 10

PLEASE LIKE THE SOLUTION

thanks this is right

Since:l =40mb=15 marea of verandah[rectangle]=l*b =40m*15m =600m.sqand stone each measuring 6dm by5dmby converting it into meter we get, 0.6m by 0.5mnow, area of stone= l*b =0.6m*0.5m =0.3m.sqnow, number of stone required =area of verandah/area of stone =600m.sq/0.3m.sq =600*10/3 =6000/3 =2000.

its a Date: nineteenth April year 2006

Yes

let 2x-3y = a=therefore equation becomes=(a+5)(a-5)=a^2-5a+5a-25=a^2-25

now substitute the values=a^2-25=(2x-3y)^2-25=4x^2-2(2x ×3y)+9y^2-25

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2 5 7 9 -----, ---- , ---- , ---- 3 8 3 13are the examples of rational number. √2 , √3, √5, √6 are the examples of irrational number

Rational number example is 2/3, 4/5, 5/6, 13/15;:;; irrational numbers V2, V5; V7

rational numbers are 1,2,3,1/3,2/5irrational number are√2, √3, √5

Numberssuch as 3/8 and -4/9 are alsorationalbecause their numerators and denominators are both wholenumbers. ... Alternatively, anirrational numberisany numberthat is notrational. It isa numberthat cannot bewrittenasaratio of twointegers(or cannot be expressed asafraction).

irrational number between √3 and√5=√ab=(√3) (√5) =√15so, that's why irrational number is √15

13^ 9 is the correct answer of the given question is

coordinate of S=(13/2,1)

slope of ps=(1-2)/13/2 -2)=(-1)/(9/2)=-2/9

Eq. of the line passing through (-1,1) and parallel to PS is

y-1=(-2/9)(x+1)

9(y-1)=-2x-2

9y-9+2x+2=0

2x+9y-7=0

thanks for answering right answer

coordinate of S=(13/2,1)slope of ps=(1-2)/13/2 -2)=(-1)/(9/2)=-2/9Eq. of the line passing through (-1,1) and parallel to PS isy-1=(-2/9)(x+1)9(y-1)=-2x-29y-9+2x+2=02x+9y-7=0

343 = 7*7*7Hence, 343 = (7)^3

343= 7×7×7 HENCE (7)3= 343

In a Euclidean space, thesumof measures of these threeanglesof anytriangleis invariably equal to the straightangle, also expressed as180°, π radians, two rightangles, or a half-turn. It was unknown for a long time whether other geometries exist, where thissumis different.In ∆ABC ,<ABC + <BCA + <CAB = 180°

tq

thanku

tank

3/10. is the correct answer of the given question

10/3.is the correct answer in this question

product=-8/9; first number given -4/15; -8/9 × 15/-4=-2/3 × -5=10/3

what is formula of rectangle

-8 / 9 by -4/15; -8 /9 × 15/-4 2/3 ×5 =10/3

= -8/9 by -4/15= -8/9 ÷ -4/15= -8/9 × -15/4= 10/3 is answer.