Download 3 equal sides Equilateral 2 equal sides Isosceles 3 unequal sides

Types of Triangles
3 equal sides
Equilateral
Line
Segment
2 equal sides
Isosceles
3 unequal sides
Scalene
Ray
Parallel
All acute angles
Acute
Triangle
One right angle
Right
Triangle
One obtuse
angle
Obtuse
Triangle
Intersecting
Perpendicular
(Intersecting)
Triangles A and B are congruent if…
...3 sides of A are congruent to 3 sides of B
…or, 2 sides and the angle between them
of A are congruent to 2 sides and the angle
between them of B.
...or, 2 angles and the side between them
of A are congruent to 2 angles and the sides
between them of B.
© 2007 abcteach.com
Horizontal
Vertical
Types of Angles
Acute
(less than 90°)
Right
(90°)
Obtuse
(more than 90°)
Abbreviations
b = base
d = diameter
h = height
l = length
r = radius
s = side
w = width
A = area
B = area of base
C = circumference
P = perimeter
V = volume
π = pi (3.14)
Straight
(180°)
Polygons:
Polyhedrons:
Simple, closed plane figures having
line segments as sides.
Space figures formed by
intersecting plane surfaces.
Type
Regular Irregular
Triangle
(3 sides)
Cube
Rectangular
Solid
Quadrilateral
(4 sides)
Pyramid
Pentagon
(5 sides)
Cylinder
Hexagon
(6 sides)
Sphere
Octagon
(8 sides)
Cone
© 2007 abcteach.com
Perimeter
Area
The distance around
The measure of the
the outside of a closed region inside a closed
figure.
plane figure.
(measured in square
units.)
Rectangle
Rectangle
w
Volume
The measure of
capacity or space
enclosed by a space
figure.
Rectangular Solid
w
h
l
P = 2l + 2w
l
A = lw
Square
Square
s
B
V = Bh
Cube
s
s
s
P = 4s
s
A = s²
V = s³
Triangle
Triangle
Pyramid
s1
s2
h
h
s3
P = s1 + s2 + s3
b
A = ½ bh
B
V = 1/3 Bh
Circle
Circle
Sphere
r
C = 2πr
or
D
or
C = πd
Any Polygon
s1 s2
s3
r
A = πr²
Trapezoid
b1
s4
s5
P = sum of all sides
h
b2
r
V = 4/3 πr³
Cylinder
V = πr²h
r
h
Cone
V = 1/3 πr²h
A = ½ h(b1 + b2)
h
r
© 2007 abcteach.com