# Geometry

## 46 terms · Mr.Wert's Class

### Prism - LA

perimeter of a base x height (ph)

### Prism - TA

LA = 2 (area of) B

### Prism - V

area of B x height (bh)

1/2pl

LA + base area

1/3 B(area)h

2 pi rh

LA + 2 B(area)

pi r-squared h

pi rl

LA + B(area)

### Cone - V

1/3 pi r-squared h

4 pi r-squared

4/3 pi r-cubed

### 45-45-90 Theorem

Hypotenuse is square root 2 times as long as a leg

### 30-60-90 Theorem

hypotenuse is twice as long as the shorter leg, and the longer leg is square root 3 times as long as the shorter leg

bh

1/2bh

1/2 d1d2

h/2 (b1 + b2)

1/2 (b1 + b2)

### Polygon - A

1/2 apothem perimeter

2 pi r

pi r-squared

### Sector - A

x/360 pi r-squared

x/360 2 pi r

=

congruent chords

congruent

half

supplementary

half

difference

### distance formula

d = square root of (x2-x1)^2 + (y2-y1) ^2

### equation of a circle

(x - a)^2 + (y - b) ^2 = r^2

y2 - y1/ x2 - x1

=

### 2 nonvertical lines are perpendicular if and only if their slopes are ________

opposite reciprocals

vertical line

horizontal line

### Find a vector

subtract first coordinates from second coordinates

### length of a vector

square root of x^2 + y^2

### midpoint formula

(x1 + x2/2, y1 + y2/2)

Ax + By = C

y = mx +b

### point slope form

y - y1 = m(x - x1)
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