Properties of Shapes, Lines, Angles, and Graphs Review

Flashcards covering the properties of 2D and 3D shapes, line types, angle classifications, rotational turns, and the structures of bar and line graphs.

Equilateral triangle

A 3-sided figure that has three equal sides and three equal angles.

Isosceles triangle

A 3-sided figure that has two equal sides and two equal angles.

Scalene triangle

A 3-sided figure that has three different sides and three different angles.

Right-angled triangle

A 3-sided figure that has one right angle ($90^{\circ}$).

Square

A 4-sided figure that has four equal sides and four equal angles.

Rectangle

A 4-sided figure that has two opposite pairs of equal sides and four right angle corners where opposite sides are parallel and the same length.

Trapezium

A 4-sided figure that has one pair of parallel lines.

Rhombus

A 4-sided figure with four equal sides and opposite pairs of equal angles.

Kite

A 4-sided figure with two pairs of adjacent sides equal and one pair of opposite angles equal.

Regular pentagon

A polygon with five equal sides and five equal angles.

Regular hexagon

A polygon with six equal sides and six equal angles.

Regular heptagon

A polygon with seven equal sides and seven equal angles.

Regular octagon

A polygon with eight equal sides and eight equal angles.

Regular nonagon

A polygon with nine equal sides and nine equal angles.

Regular decagon

A polygon with ten equal sides and ten equal angles.

Parallel lines

Straight lines that are the same distance apart and never meet, regardless of their length.

Perpendicular lines

Lines that meet at $90^{\circ}$ of each other and need not be equal in length.

Diagonal line

A straight line that joins two opposite vertices (corners) of a figure like a rectangle.

Right angle

An angle that is equal to $900$.

Straight line angle

An angle equivalent to two right angles, equal to $1800$.

Acute angle

An angle smaller than a right angle that is less than $900$.

Obtuse angle

An angle larger than a right angle but smaller than a straight-line angle, measuring more than $900$ but less than $1800$.

Full turn

A movement comprising $3600$ in total.

Eight-point compass interval

The distance between each marked direction on a compass, which is $450$ ($360 \div 8$).

3D Shapes (Examples)

Includes Cube, Cuboid, Cone, Cylinder, Sphere, Hemisphere, Triangular Prism, Pentagonal Prism, Hexagonal Prism, Octagonal Prism, Square Pyramid, Triangular Pyramid, and Octahedron.

x-axis

The axis on a bar or bar-line graph that usually runs horizontally.

y-axis

The axis on a bar or bar-line graph that usually runs vertically and starts counting at $0$.

Line graph

A chart displaying information as a series of datapoints connected by straight line segments, used to show change over time.

Markers

The name for the datapoints in a line graph that are connected by straight line segments.

Conversion graph

A graph used to change one quantity to another when units are changed, such as converting inches to centimetres.