Y9

Angles

100

An angle less than 90 degrees

acute angle

200

An angle that's exactly 90 degrees

right angle

300

An angle that's greater than 90 degrees but less than 180 degrees

obtuse angle

400

An angle that's exactly 180 degrees

straight angle

500

An angle that's greater than 180 degrees

reflex angle

Shapes

100

Any closed 2D shape is called a _______

Polygon

200

A polygon where all sides and angles are equal is a _____ polygon.

regular

300

A polygon with 5 sides is called a ________

pentagon

400

To find the sum of all the angles of a polygon, you can use this formula:

angle sum = (n - 2) *  180

[n = # of angles in the polygon]

500

A 12-sided polygon is called a

dodecagon

Geometry Vocab

100

Part of a line that begins at a point and extends forever in one direction

Ray

200

2D object that has no endpoints and continues forever in both directions

Line

300

The point at which the rays of an angle or sides of a polygon meet

Vertex

400

Any polygon with 4 sides, 4 angles, and no angles greater than 180 degrees

Quadrilateral

500

Any polygon with 4 sides and 4 angles

Quadrangle

Equation Vocab+Random

100

A _____ equation forms a line.

Linear

200

y=mx+b is the __________ form of a linear equation

Slope-Intercept

300

y-y₁=m(x-x₁) is _______ form of a linear equation

Point-Slope

400

y = 5^x is a ______ equation

Exponential

500

The INVERSE of an exponential equation is a ______ equation

logarithmic