Rectangle ABCD is the base of pyramid PABCD. If AB=8, BC=4, PA perpendicular to AD, PA perpendicular to AB, and PB=15. Then what is the volume of PABCD?
+14915 Rectangle ABCD is the base of pyramid PABCD. If AB=8, BC=4, PA perpendicular to AD, PA perpendicular to AB, and PB=15. Then what is the volume of PABCD?
Hello Guest!
\(h=\overline {PA} =\sqrt{15^2-8^2}\)
\(h=\sqrt{161}\)
\(V=\frac{1}{3}\cdot \overline {AB}\cdot \overline {BC}\cdot h=\frac{1}{3}\cdot 8\cdot 4\cdot \sqrt{161}\)
\({\color{blue}V=10.\overline 6\cdot\sqrt{161}}\approx135.345\)
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