- Measure your actual, total body height in inches. Do NOT tell the other person!
- Take a digital photo.
- Measure each other’s height in the photo in inches. Share each other’s height from the photo.
- Construct a proportion including your total, actual body height and both heights from the digital photo. Solve for the other person’s actual height. Ask the other person to compare your calculation with the other person’s measured height. How close was your solution?
How long is the other person’s head only using the digital photo?
- Measure your own head length in the
photo in inches. Measure the head length from the bottom of the chin to
the top of the forehead. Do NOT tell the other person!
- Take the measurement of your total body height in inches from the digital photo from #1 above.
- Construct a proportion including your
total digital body heights and your own head length. Solve for the
other person’s head length. Ask the other person to compare your
calculation with the other person’s measured head length. How close was
your solution?
- How many times longer is one’s total body height than one’s head length?
The head width is used as a guide to shoulder width, which should be about three head widths. All of the other measurements are based on head height.
How many inches is the other person’s elbow to his/her fingertips only using the digital photo?
- Measure the distance from your elbow to your fingertips on your digital photo. Do NOT tell the other person!
- Construct a proportion
including both persons’ head lengths and your own measurement from your
elbow to your fingertips on your digital photo. Solve for the length
from the other person’s elbow to his/her fingertip. Ask the other
person to compare your calculation with the other person’s measured
distance from his/her elbow to his/her fingertips. How close was your
solution?
- How many times longer is one’s elbow to fingertips than one’s head length?
- Measure the distance from the top of your hip to the floor in your digital photo. Do NOT tell the other person!
- Construct a proportion
including your measurement of your hip to the floor in inches in your
digital photo and the length of both students’ head lengths in the
digital photo. Solve in inches for the length of the other person’s top
of the hip to the floor. Ask the other person to compare your
calculation with the other person’s measured distance from the top of
the hip to the floor. How close was your solution?
- How many times longer is a person’s hip to the floor than that person’s head length?
Compare the length of a person’s total height with the length from fingertips to fingertips only using the digital photo.
- Measure the distance from your fingertips to your other fingertips in your digital photo. Do NOT tell the other person!
- Construct a proportion
including your measurement from your fingertips to your fingertips in
inches in your digital photo and both total body heights from the
digital photo. Solve in inches the length of the other person’s
fingertips to fingertips.
- How many times longer is the measurement from fingertips to fingertips than a person’s overall body height?
- The average adult is seven heads tall.
- The top of the hips are four heads high.
- The pelvic region is about one head high.
- Elbow to fingertip is about two head lengths.
- Wrist to fingertip is one head length.
