help, please! {seventh grade}
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Answer:
Answer is 56 sq. cm
Step-by-step explanation:
We can see that the pyramid is divided into 4 triangles with height 5cm and base 4 cm. Also the base is a square with side 4cm.
Therefore, the
surface area = 4(area of triangles)+area of square.
Area of triangle = 1/2 X BASE X HEIGHT
= (1/2 X 4 X 5) sq. cm
=10 sq.cm
Area of all triangles = (4 X 10) sq. cm
= 40 sq. cm ------(1)
Area of square = side X side
=(4X4) sq. cm
=16 sq. cm ------(2)
Adding (1) & (2),
Surface area=(40+16) sq. cm = 56 sq. cm