madbiebzz
16.04.2020 •
Mathematics
My answer is 26ft am i correct?
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Ответ:
a.Length of base=4 inches
Length of height=12 inches
b.Area of triangular faces=96 square inches
c.Surface area of pyramid=112 square inches
Step-by-step explanation:
We are given that base of pyramid is square shaped with side 4 inches long
Other faces are isosceles triangles
We are given that ratio of height of each triangle to its base =3:1
a.We have to find the length of base and the height of each triangular face
Length of base=4 inches
Height is 3 times the base
Therefore, length of height=
b.There are 4 triangular faces
We know that area of triangle=
Using this formula
Area of one triangular face =
=24 square inches
Area of 4 triangular faces=
c. Surface area of pyramid=area of 4 triangular faces+area of square
Surface area of pyramid =