Monday

September 22, 2014

September 22, 2014

Posted by **Fustrated** on Monday, February 6, 2012 at 9:37pm.

- math -
**Reiny**, Monday, February 6, 2012 at 9:53pmLook at one of the triangles, which is isosceles with a base of 8 and each of the equal sides of length 20

Height of triangle: let it be h

h^2 + 4^2 = 20^2

h^2 = 384

h = √384

Area of one triangle = (1/2)(8)(√384) = 4√384

Assuming the surface area consists only of the 4 triangles,

surface area = 4(4√384) or 16(8√6) = 128√6

- math -
**Fustrated**, Monday, February 6, 2012 at 10:07pmThanks, but I need the base too - that I can do by myself!

**Answer this Question**

**Related Questions**

Geometry - The base of a regular pyramid is a hexagon whose sides have length 5 ...

Mathematics - OPQRS is a right pyramid whose base is a square of sides 12cm each...

Math - A square pyramid each side of the base has a length of 60 m and the ...

Maths - OPQRS is a right pyramid whose base is a square of sides 12cm each. ...

Maths - OPQRS is a right pyramid whose base is a square of sides 12cm each. ...

Geometry - 1 How many faces does a square pyramid have? 2 How many edges does a ...

MATH! PLEASE REPLY ASAP! - OPQRS is a regular square-pyramid whose base has ...

Math - The base of a mid pyramid is triangle whose length of 3 sides are 28cm,...

MATH - A regular triangular pyramid has an altitude of 9m and a volume of 46.8cu...

geometry - A pyramid has a square base with sides length of b. The height of the...