Frog data measurements:

How might we determine the slope of a frog's head from nose tip to eye-top? Here we describe measurements that let us calculate the frog's head slope in degrees and we cite an alternative method using a folding ruler that could have been used to get frog (or other animal) dimensions from a distance - which sometimes is a better idea. .

This article series gives clear examples just about every possible way to figure out any or all roof, stair, or other building slopes & construction dimensions and measurements expressing the area, width, length, slope, rise, run, and unit rise in inches per foot.

All of the Ways to Get the Slope of a Frog, a Roof or the angle anything else that is sloping

With just a small amount of effort one could calculate the slope of anything, even a frog's head. We measured this frog's head last spring. The frog was too nervous to allow use of my angle-finder level so I took a different approach. I made some rough measurements of his little head.
Also see ANGLE FINDER LEVEL

[Click any image to see an enlarged, detailed version]

Dimension (a) from the frog's nose to the top of his eye was 0.75 inches.

Dimension (b) from the frog's nose to directly under the top of his eye turned out to be 0.63inches.

Dimension (c) - the green line happened to be 0.5 - about a half of an inch.

At this point the frog left before I could get out my angle measuring protractor. But the tangent function or TANGENTS TABLE came to the rescue.

Using Tangents to Study Frogs

Tangent (Frogs head slope) = (Frog Nose Rise / Frog Jaw Length)

or for the particular frog under examination,

Tangent (Frogs head slope) = (c) / (b) = 0.5 / 0.63 inches = .873

I used Tan^-1 (0.873) to convert the tangent to slope in degrees = 41 degrees - which looks about right, right?

This frog's head slopes from nose to eye top at 41 deg.

Student Exercise: Measure the Angle of This Frog's Face

The handsome frog shown above posed on water lillies in a pond in the Laurentides region of Quebec while I was at spore camp. The darker green triangle on the top of the frog's head from tip of nose to those round (ovate) ears would be another easy-to-spot triangle whose angle you can measure using the method we've given above.

A neat trick that we could have used to measure the angle of the frog's head without ever getting close to it is shown using a folding ruler explained
at ROOF MEASURE by FOLDING RULE.

You can calculate slope of anything, even a frog if you know just one or two measurements.

Details are in the articles listed just below.

You can estimate the roof slope from the ground by any of several methods described

at ROOF MEASUREMENTS,

A stunning amount of fun and explanation of messing with roof slopes, angles, rulers, and a protractor are demonstrated

at FOLDING RULER ROOF SLOPE CALIBRATION

Really?

Obviously there are other very precise ways to make measurements from a distance, as any surveyor knows, using geometry, trigonometry, and instruments such as a sextant, dumpy level, a theodolite, GPS devices, and more.

...

Continue reading at HOPPUS MEASURER or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see these

Recommended Articles

• 6-8-10 RULE to SQUARE UP ANY STRUCTURE
• ANGLE FINDER LEVEL
• ARCTANGENT CALCULATES ROOF / STAIR ANGLE
• CALCULATE RISE & RUN from SLOPE
• FOLDING RULER ROOF SLOPE CALIBRATION
• FRAMING TRIANGLES & CALCULATIONS
• FROGS HEAD SLOPE MEASUREMENT
• HOPPUS MEASURER
• LOW SLOPE ROOFING
• PRINTABLE PROTRACTOR [Image file]
• RAMP SLOPE or PITCH
• ROOF MEASUREMENTS
  • ROOF MEASURE ON ROOF
  • ROOF MEASURE INDOORS
  • ROOF MEASURE at GABLE END
  • FRAMING SQUARE USER'S GUIDE
  • ROOF MEASURE FROM GROUND
  • ROOF MEASURE by FOLDING RULE
  • ROOF CALCULATIONS SUMMARY
  • ROOF ESTIMATES by FLAT PROJECTION
• ROOF SLOPE CALCULATIONS - Uses of Tangent & Tan^-1 when Working With a Right Triangle (building roofs, stairs, walks, or whatever)
• ROOF SLOPE DEFINITIONS
• ROOF SLOPE TABLE, TYPES, WALKABILITY
• STAIR RISE & RUN CALCULATIONS
• TANGENT & SLOPE CALCULATIONS

Suggested citation for this web page

FROGS HEAD SLOPE MEASUREMENT at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

Or see this

INDEX to RELATED ARTICLES: ARTICLE INDEX to BUILDING ROOFING

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Citations & References

In addition to any citations in the article above, a full list is available on request.

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