SOLUTION: 2 D B 6cm 8cm NOT TO SCALE AEC 5cm 5cm F The diagram shows a sketch of the net of a solid tetrahedron (triangular prism). The right-angled triangle ABC is its base. AC= 8cm, BC =

Question 1074305: 2 D B 6cm 8cm NOT TO SCALE AEC 5cm 5cm F The diagram shows a sketch of the net of a solid tetrahedron (triangular prism). The right-angled triangle ABC is its base. AC= 8cm, BC = 6cm and AB = 10cm. FC = CE = 5cm. (a) (i) Show that BE = √61cm. (ii) (iii) Write down the length of DB. Explain why DA = √89cm. (b) Calculate the size of angle DBA. (c) Calculate the area of triangle DBA. (d) Find the total surface area of the solid. (e) Calculate the volume of the solid. [The volume of a tetrahedron is 13 (area of the base) � perpendicular height.]
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
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For your info:

Tetrahedron is a triangular pyramid (!). Not a prism (!!).

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