ACT Prep Formula (Math)

the slope-intercept form of a line

y=mx+b

area of a circle

A=πr²

the Pythagorean theorem

a²+b²=c²

the midpoint formula

(x₁+x₂/2,y₁+y₂/2)

the volume of a rectangular solid

V=lwh

the area of a circle

A=πr²

the equation of a circle

(x-h)²+(y-k)²=r²

the trigonometric ratio of tangent

opp/adj

the distance formula between two points

d=√(x₂-x₁)²+(y₂-_y1)²

the slope formula

m=y₂-y₁/x₂-x₁

the trigonometric ratios of cosine

adj/hyp

the circumference of a circle

C=2πr; C=πd

the area of a square

s²

the trigonometric ratios of sine

opp/hyp

the area of a triangle

A=1/2bh

the degree measure of a line

180°

define perimeter

it’s the sides of a polygon

what type of lines always have the same slope?

parallel

the sum of the interior angels of a triangle is

180°

the sum of the interior angles of a 4 sided polygon is ____ and add ____ degrees to the sum of the interior angles for each additional side added to a polygon (formula?)

360°; 180; (n-2)180

what is the formula for the area of a trapezoid?

A=1/2h(b₁+b₂)