Tags » Spatial Reasoning

Measure of Angle

, and are vertices of a cube, as shown. Find the measure of .

Source: NCTM Mathematics Teacher, December 2005

SOLUTION

Triangle is equilateral because its three sides are diagonals of a square. The measure of equals .

Answer:

Problem Solving

Tetrahedron

Four of the nonadjacent vertices of a cube form a regular tetrahedron. What is the ratio of the surface area of the cube to the surface area of the tetrahedron? 76 more words

Problem Solving

Red Face

A cube with all its faces painted red is cut into cubes that are . Some of these new cubes will have some red faces. The cubes are placed in a bag and thoroughly mixed. 145 more words

Problem Solving

Celebrating Autumn From Smallest to Biggest and Spiral

This kids are 1,4, and 5 at this point last. There are leaves everywhere from the Sycamore tree. So where there is nature, there is math. 216 more words

18 Months To 3 Years Old

What Do Bird Calls and Babies Have to Do With Each Other?

By exploring with sound, babies and young toddlers practice their visual thinking skills and spatial-reasoning skills. Good visual thinking skills are essential for a child to later excel in math, science, and geography. 102 more words

Babies

Which Dice Did I Roll? (Age 7)

The Activities

  1. Topic: Numbers: Book: The Number Devil by H. Enzensberger, Chapter 2.
  2. Topics: Probability, Graphs: We revisited the activity from last week where we made two big charts, one for the sum of two six-sided dice, the other for a twelve-sided die.  
  3. 382 more words
Circle 1

Cinderella's Castle Vs. Elsa's (Age 7)

The Activities

  1. Topic: Graphs. Book: Graphs by Bader.A kid does his math homework at a family reunion by graphing various things. The kids all loved the surprise ending.
  2. 428 more words
Circle 1