ADVERTISEMENT

Problems of the Week

19

Visual

Construct a triangle on the

geoboard so that there is the

largest number of pegs

possible inside the triangle.

How many pegs are inside?

Data/Investigations

Multi-Step

Materials: 1 stop watch

Have students sit in rows of 5.

• Begin with 1 row of students.

Feet on the Earth, Head in the Sky

• At the timer’s signal, the first student

A six-foot tall person walks around

stands up, waves his or her arms overhead

the earth. How much farther does the

and sits down. Then each student repeats

person’s head travel than the person’s

the wave. After the last student sits down,

feet?

the timer records the time in seconds.

• Repeat for 10, 15, 20 and 25 students.

From: Mathematical Challenges for the

• Graph the ordered pairs on a coordinate

Middle Grades, NCCTM, 1991, p. 24.

plane (x-axis = # of students; y-axis = time)

How long would it take 35 students to

complete the wave? 45 students? number of

Geometry/

students in the 8th grade at your school?

Measurement

Problem-Solving

Strategies

By what factor does the volume

increase if the radius and the

height of a cylinder are doubled?

How many ways are there in which Farmer

Brown can place his animals (a donkey, a cow, a

goat, a pig, a sheep and a horse) in two fields so

that at least one animal is in each field?

What Do You Say?

Explain how you would figure the surface

area of a cylinder.

Grade 8 • Page 55

ADVERTISEMENT

0 votes

Parent category: Education