#### Study sets matching "pre geometry formulas"

#### Study sets matching "pre geometry formulas"

Pythagorean Theorem

30-60-90 triangle

45-45-90

sin

a^2 + b^2 = c^2

H= short leg × 2... Long leg = short leg√3... short leg = H÷2 or lo…

H= leg√2

opposite÷hypotenuse

Pythagorean Theorem

a^2 + b^2 = c^2

30-60-90 triangle

H= short leg × 2... Long leg = short leg√3... short leg = H÷2 or lo…

Reflect a point in the x-axis

Reflect a point in the y-axis

Reflect a point in the line y=x

Slope-intercept form

Switch sign of y-coordinate

Switch sign of x-coordinate

Interchange x- and y-coordinates

Y=mx+b

Reflect a point in the x-axis

Switch sign of y-coordinate

Reflect a point in the y-axis

Switch sign of x-coordinate

What are the Triangle Similarity Short…

What is the formula for Geometric Mean?

What is the geometric mean altitude fo…

What are the geometric mean leg formul…

SAS, SSS, and AA

X= square root of (ab)

h=square root of (xy)

a=square root of (y

**m of ADB) and b= square root of (x**m of A…What are the Triangle Similarity Short…

SAS, SSS, and AA

What is the formula for Geometric Mean?

X= square root of (ab)

prism

pyramid

sphere

cone

v: lwh ... sa: area of all sides added together... la: area of ever…

v: lwh/3 ... sa: a of base+area of all faces... la: area of everyth…

v: 4/3 x pi x r^3... sa: 4 x pi x r^2

v: a of base x height/3... la: pi x r x L... sa: pi x r^2+ la

prism

v: lwh ... sa: area of all sides added together... la: area of ever…

pyramid

v: lwh/3 ... sa: a of base+area of all faces... la: area of everyth…

Central Angles

Inscribed Angles (Vertex ON the circle)

Chord/Chord Angles (Vertex inside the…

Chord/Tangent Angles (Vertex at point…

The arc is the same as the central angle.

Divide the inscribed angle by two.

(mAB+mCD)/2

m<1=(1/2)mAB

Central Angles

The arc is the same as the central angle.

Inscribed Angles (Vertex ON the circle)

Divide the inscribed angle by two.

Mid point formula

Distance Formula

Slope

Area of a square; Perimeter of a square

[(x₁+ x₂)/2 , (y₁+ y₂)/2]

d = √[( x₂ - x₁)² + (y₂ - y₁)²]

Rise over run;... The steepness of a line on a graph... (y₂-y₁)/(x₂…

Mid point formula

[(x₁+ x₂)/2 , (y₁+ y₂)/2]

Distance Formula

d = √[( x₂ - x₁)² + (y₂ - y₁)²]