SOLUTION: please help me in my homework..i need it tomorrow..please.. the base of a pyramid is an isosceles triangle whose sides are 78cm long (each), the third side equalling 60cm. each

Question 30325: please help me in my homework..i need it tomorrow..please..
the base of a pyramid is an isosceles triangle whose sides are 78cm long (each), the third side equalling 60cm. each dihedral angle at the base contains 45 degrees. find the volume of the pyramid.
Answer by Fermat(136) (Show Source): You can put this solution on YOUR website!
There seems to be a problem with this question.
The base of the pyramid is given as an isosceles triangle. Two long sides (equal) and a third, shorter, side.
The dihedral angle is the (smallest) angle between the sloping face of the pyramid and one of the base sides.
But, the dihedral angles are only all equal if the base is a regular shape, an equilateral triangle, square, regular pentagon, hexagon, etc. The body of the pyramid should also be regular. Not sloping.
Your two equal long sides will have the same dihedral angle but that will be different from the other one.
Does the dihedral angle apply to only the two equal sides ?
If so, then the problem is easily solved.
In any case the volume of a pyrimid is 1/3 times the area of the base times the vertical height (from the base to the height of the apex).
RELATED QUESTIONS
hello.. please help me solve this problem. I urgently need it tomorrow. please?? I... (answered by richwmiller)

I am having trouble with some homework and need your help please. The question is:" What... (answered by richard1234)

Draw the outline of the unfolded figure needed to construct a right square pyramid whose... (answered by stanbon)

Hi. I'm having trouble finding the surface area for my geometry homework. I need... (answered by drk)

Please help me find the volume, to the nearest tenth, of a pyramid that is 6 feet tall... (answered by Earlsdon)

I have no book. Find the volume, to the nearsest tenth, of a pyramid that is 6 feet tall (answered by checkley77)

If the height of the pyramid is 139 m and the base is a 230 m x 230 m square, what is the (answered by Boreal,ewatrrr)

2 isosceles triangles have legs that are 26 and areas that are equal. If the base of one... (answered by ewatrrr)

The perimeter of an isosceles triangle is 85 centimeters. the ratio of the length of the... (answered by josgarithmetic)