Download Geoboard Triangles

Excerpted from:
Bridges in Mathematics K-5
The Math Learning Center
P.O. Box 12929
Salem, Oregon 97309-0929
1–800–575–8130
Additional resources at:
www.mathlearningcenter.org
© 2005–2009 Math Learning Center
Information Related to the Attached Activity—
QTaxon(s): QT-G-624
Quantile measure: 610Q
®
The Quantile Framework® for Mathematics, developed by educational measurement organization
MetaMetrics®, comprises more than 500 QTaxons (skills and concepts) taught from kindergarten
through high school. The Quantile Framework depicts the developmental nature of mathematics
and the connections between mathematics content across the strands. By matching a student’s
Quantile measure (for example, 650Q) to the Quantile measure of a mathematical skill or
concept, you can see if the student is ready to learn that skill, needs to learn supporting
concepts first, or has already mastered it. For more information and to use free Quantile
resources, visit www.Quantiles.com.
MetaMetrics®, Quantile®, Quantile Framework® and the Quantile logo are trademarks of MetaMetrics, Inc., and are registered in the United States and abroad.
Set C2 Geometry: Triangles & More Blackline Use anytime after Set C2 Activity 2. Run a class set.
name
date
Set C2 H Independent Worksheet 4
Independent Worksheet
More Geoboard Triangles
Remember that you can classify and describe triangles in two different ways:
• by the size of their angles
Right Triangle
Acute Triangle
acute
angle
Obtuse Triangle
right
angle
obtuse
angle
One of the angles
is a right angle.
One of the angles is obtuse.
Isosceles Triangle
Scalene Triangle
Equilateral Triangle
Two sides are the
same length.
Each side is a
All 3 sides are
the same length.
All 3 angles are acute.
• by the length of their sides
1
different length.
Follow the instructions above each geoboard to draw some different triangles
Hint Build your triangles on a geoboard first. Then copy them onto the paper.
a
A Right Triangle
© The Math Learning Center
b An Isosceles Triangle
c
An Acute Triangle
(Continued on back.)
Bridges in Mathematics Grade 3 Supplement • C2.27
Set C2 Geometry: Triangles & More Blackline Run a class set.
Independent Worksheet 4 More Geoboard Triangles (cont.)
d
An Obtuse Triangle
g
A Right Triangle that
is also Scalene
e
h
A Scalene Triangle
An Acute Triangle
that is also Scalene
f
A Right Triangle that
is also Isosceles
i
A Scalene Triangle
that is also Obtuse
challenge
2
Dana says it is impossible to draw a right triangle that is also acute. Do you
agree with her? Why or why not? Use the geoboards below to test your ideas.
C2.28 • Bridges in Mathematics Grade 3 Supplement
© The Math Learning Center