I know, the math on Enem is completely scary. I swear I understand you! But don’t worry, because tt is here to help you make this part of the test extremely smooth.
And you already know where we’re going, right? We have to memorize the formulas. So roll up your sleeves and get ready to dive into these 10 sets of essential math formulas if you want to beat the Enem. Let’s go there? Then we go!
Areas of flat figures
Rectangle: bhh
Square: L²
Diamond: Days/2
Triangle: bh/2
Equilateral triangle: 3L²/4
Circle: π.R²
Trapeze: (B+b).h/2
Volume and area of the main solids
Ball:
V= 4,πR³/3
A= 4.π.R²
Cylinder
V=π.R².h
A= 2.π.Rh + 2.π.R²
Cone
V=π.R².h/3
A= π.R(R+g), where g is the generator of the cone
Prism
V=Ab.H
Pyramid
V=Ab.H/3
triangles
Pythagorean theorem: a²=b² + c², where “a” is the hypotenuse.
cos α = CAT ADJ/Hip
sin α = CAT OP/Hip
tgα = CAT ADJ/CAT OP = sin α/cos α
Fundamental relationship: sin²α + cos²α = 1
Law of sines: (a/sine)= (b/sinb) = (c/sinc) = 2R, where a, b and c are the sides of the triangle and R is the radius of the circle circumscribed by this triangle.
Law of cosines: a²=b² + c² – 2.bc.cos(a)
Commissions
Simple: J=cit
Composed: M= C.(1+i)t.
1st degree function
General law: Y=ax+b
a= Dy/Dx
b is the point where the function cuts the y-axis
PS: the graph is a straight line.
2nd degree equation
General law: Y= a.X² + bX + c
Factorial: Y= a.(X-r1).(X-r2)
The Bhaskara formula
∆ = b² – 4ac
Root = (-b ± √∆)/2a
Xv = -b/2.a
Yv = ∆/4.a
Arithmetic progression
An= a1 + (n-1).r
Sn= (a1 + an).n/2
Geometric progression
An= a1.qn-1
Sn = a1.(qn-1) /q-1
Sinfinity= a1/1-q
Source: Terra
Ben Stock is a lifestyle journalist and author at Gossipify. He writes about topics such as health, wellness, travel, food and home decor. He provides practical advice and inspiration to improve well-being, keeps readers up to date with latest lifestyle news and trends, known for his engaging writing style, in-depth analysis and unique perspectives.
