Chapter 10 Geometry
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27 terms
English | Math / Symbols |
|---|---|
 Area of a Rectangle (formula) | A= length x width |
| Area of a Parallelogram (formula) | A= base x height |
| Area of a Triangle (formula) | A= (base x height) ÷ 2 |
| Area of an Equilateral Triangle (formula) | A= (side² x √3) ÷ 4 |
| Height of a Trapezoid | The length between the two bases |
| Area of a Trapezoid (formula) | A= (base₁ + base₂)height ÷ 2 |
| Area of a Rhombus or Kite (formula) | A= (diagonal₁ x diagonal₂) ÷ 2 |
| Radius | Distance from center to a vertex |
| Apothem | ⊥ distance from the center to a side |
| Area of a Regular Polygon (formula) | A= (apothem x perimeter) ÷ 2 |
| Perimeters and Areas of Similar Figures Theorem | The ratio of the perimeters is a/b. The ratio of the areas is a²/b² |
| Concentric Circles | Circles with the same center |
| Semicircle | 1/2 a circle |
| Minor Arc | An arc that is smaller than a semicircle |
| Major Arc | An arc that is greater than a semicircle |
| Measure of an Arc | Same as central angle opposite it |
| Adjacent Arc | Arcs on the same circle that have exactly one point in common |
| Congruent Arcs | Arcs that have the same measure and are in the same circle or a congruent circle |
| Pi | The ratio between all circles' circumference and diameter |
| Circumference of a Circle | diameter × π OR 2 × π × radius |
| Area of a Circle | A= πr² |
| Length of Arc | (measure of arc ÷ 360) × (2πr) |
| Sector of a Circle | A region in a circle bound by 2 radii and an arc |
| Area of a Sector | (measure of arc ÷ 360) × (πr²) |
| Segment of a Circle | A part of a circle bound by an arc and the segment joining its endpoints |
| Area of a Segment | A= measure of sector - measure of triangle |
| Geometric Probability | P(event)= Favorable area ÷ Total area |
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