# Geometry Test 1

### 32 terms by mmknopp16

#### Study  only

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a, 2a, a√3

a, a, a√2

### Polygon

closed, 2D figure whose sides are segments (straight) and intersect only at their end points (vertex; vertices)

### Trapezoid

a quadrilateral with exactly one set of parallel sides

### Parallelogram

a quadrilateral with exactly two sets of parallel sides

### Rhombus

a parallelogram with four congruent sides (not necessarily 90° angles)

### Square

a quadrilateral with two sets of equal sides and four 90° angles

### Rectangle

a quadrilateral with two sets of equal sides and four 90° angles

pentagon

hexagon

heptagon

octagon

nonagon

n-gon

### Area

measurement of space inside a figure

### Area of a Parallelogram

Area=base x height

### Area of a Trapezoid

(only 1 set of parallel lines) A=(b1+b2/2)h

### Circumference (definition)

measurement around circle

### Circumference (formula)

circumference=diameter x ∏ (pi)

A=∏(r2)

### Prism

has 2 congruent bases that are parallel (can be any polygon) All remaining faces (sides) are rectangles

### Cylinder

a solid with 2 congruent circular bases that are parallel to each other

### Surface area (S.A.)

the sum of the areas of the faces of a solid

A=1/2 bh

a2+b2=c2

### Equilateral

congruent sides and angles

### Isosceles Triangle

has 2 congruent sides

### Scalene Triangle

has NO congruent sides

<90°

exactly 90°

>90°

### Perimeter

the sum of the measurements of each face of a polygone

Example: