Triangles
A triangle with three equal sides
Equilateral Triangle
A four-sided shape with no equal sides and no equal angles.
Irregular Quadrilateral
A straight, level line that extends from left to right.
Horizontal
Distance all the way around a figure or shape.
Perimeter
Figure with four sides, where the opposite sides are equal.
rectangle
A triangle with two equal sides.
Isosceles Triangle
Has opposite sides that are parallel and of equal length.
Think of a rectangle that has been slanted to one side.
A straight line that runs up and down.
Vertical
How do you find the perimeter of an object.
by adding the sides together
An enclosed shape of three or more sides.
Polygon
A triangle with all different sides.
Scalene Triangle
A four sided flat shape with straight sides that have a pair of opposite parallel sides, but not usually equal in length.
Trapezoid
Two lines that never meet. They are always the same distance apart
Parallel
What needs to be included in your answer when writing down the perimeter?
The measurement (unit)
"Quad" means four (like in "quarter") and "lateral" means side, so it's a "four-sided" shape
Quadrilateral
May be isosceles or scalene, but one angle must be a right angle.
Right Angle Triangle
A parallelogram with four equal sides.
Think of a square that has been slanted to one side.
Rhombus
Two lines that cross at right angles.
Perpendicular
Figure with four equal sides and four equal angles.
Square
A triangle with three angles that measure less than 90 degrees.
Acute Triangle
A triangle with one angle that is greater than 90 degrees.
Obtuse Triangle
What is a 10 sided object called?
Decagon
A line that bends and is not straight.
curved
P = 2W + 2L
Perimeter of a rectangle
The measure of an object from side to side.
Length