5.8 Geometry and Measurement Study Guide flashcards

A set of vocabulary flashcards covering basic geometry concepts including volume, areas of triangles, classification of angles and triangles, and use of a protractor.

Volume of a rectangular prism

The amount of space there is within a rectangular prism, measured in cubic units.

Volume Formula (Rectangular Prism)

$$\text{Volume} = \text{length} \times \text{width} \times \text{height}$$

Area of a Triangle Formula

$$\text{Area} = \frac{\text{base} \times \text{height}}{2}$$

Algebraic Multiplication

In algebra, when two letters are next to each other, or a number and a letter are next to each other (such as $2a$), it means they should be multiplied.

Right Angle

An angle that forms a square corner.

Straight Angle

An angle that forms a line.

Acute Angle

An angle that is less than a right angle.

Obtuse Angle

An angle that is greater than a right angle and less than a straight angle.

Equilateral Triangle

A triangle that has 3 congruent sides.

Isosceles Triangle

A triangle that has 2 congruent sides.

Scalene Triangle

A triangle that has 0 congruent sides.

Right Triangle

A triangle that has one $90^\circ$, or right angle.

Acute Triangle

A triangle that has 3 acute angles.

Obtuse Triangle

A triangle that has 1 obtuse angle.

Protractor

A tool for measuring the size of an angle.

$$m \angle DCE$$

Notation read as 'the measure of angle DCE'.