A square of side 5cm and four isosceles triangles, each of one side 5cm and height to the opposite vertex 8cm ;these are to be joined to make a square pyramid. How much paper is needed for this job?
Answers
Answered by
2
Answer:
Step-by-step explanation:
Side of the square = 5 cm
Base of the isosceles triangle = 5 cm
Height of the isosceles triangle = 8 cm
Area of the square = (side)2 = (5 cm)2 = 25 cm2
Area of one isosceles triangle =
Area of four isosceles triangles = 20 × 4 cm2 = 80 cm2
Area of the square pyramid = Area of the square + Area of four isosceles triangles
= (25 + 80) cm2
= 105 cm2
Thus, we need 105 cm2 paper for the job.
Similar questions