Quadrilateral pyramid

Find the height and surface of a regular quadrilateral pyramid with a base edge a = 8cm and a wall height w = 10cm. Sketch a picture.

Correct answer:

h =  9.1652 cm
S =  224 cm2

Step-by-step explanation:

a=8 cm w=10 cm  w2=(a/2)2+h2  h=w2(a/2)2=102(8/2)2=2 21=9.1652 cm
S1=a2=82=64 cm2  S2=2a w=28 10=40 cm2  S=S1+4 S2=64+4 40=224 cm2



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Tips to related online calculators
Pythagorean theorem is the base for the right triangle calculator.
See also our trigonometric triangle calculator.

 
We encourage you to watch this tutorial video on this math problem: video1   video2

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