id: 05988809
dt: j
an: 2012a.00912
au: Young, Elaine
ti: Trapezoids to triangles.
so: Math. Teach. Middle Sch. 15, No. 7, 414-419 (2010).
py: 2010
pu: National Council of Teachers of Mathematics (NCTM), Reston, VA
la: EN
cc: U63 G43 H23
ut: teaching aids; manipulative materials; concept formation; triangle
sequences; repeating tile sequences; worksheets; trapezoid pattern
blocks; student activities; perfect square numbers; elementary algebra;
plane geometry
ci:
li:
ab: From the introduction: Pattern blocks are often used in math class during
geometry lessons to support concepts of shape, angle, tessellations,
and symmetry. They are also used with fraction study. Using pattern
blocks to construct other larger geometric shapes can help students
understand the relationships among various shapes. Algebraic
relationships and functions emerge when students count blocks and
measure figures. The activities in this article support the development
of such geometric vocabulary as {\it perimeter, area, sequence}, and
{\it nonstandard measurement}.
rv: