Shapes
Shapes 2
Perimeter/Area
Angles
Lines
100
A shape made of 4 sides
quadrilateral
100
All triangles must have 2 of these types of angles
acute angles
100
The formula for perimeter
l + w + l + w
100
I measure exactly 90 degrees
Right angle
100
I have two endpoints
line segment
200
A shape made of 4 right angles
rectangle
200
A triangle with one obtuse angle
obtuse triangle
200
The formula for area
l x w
200
I measure more than 90 degrees
Obtuse angle
200
I do not end with endpoints but instead I go on forever
line
300
A 4-sided shape with 2 sets of parallel lines
parallelogram
300
A triangle with one right angle
right triangle
300
This measures around the outside of a shape
perimeter
300
I measure less than 90 degrees
acute angle
300
I have one endpoint and the other end goes on forever.
ray
400
A 4-sided shape with equal side lengths
rhombus
400
trapezoid
400
This measures how much the inside of the shape covers
area
400
I measure 180 degrees
straight angle
400
I am two or more lines that will never touch
parallel lines
500
A 4-sided shape with 4 right angles and 4 equal sides lengths
square
500
This trapezoid has a special name based on the angles
right trapezoid
500
This is where I will look for the formula for EVERY perimeter and area question no matter how confident I am about the formula. If I don't look, it's because I am arrogant and lazy.
cheat sheet (STAAR reference)
500
I am lines that form a right angle
perpendicular lines
500
I am two lines that meet at one point
Intersecting lines