2 answers:
Hey there! :)
You have to find the area of all of them and add it together
Formulas:
Area of a triangle ⇒ (b · h) ÷ 2
Area of a square ⇒ l · w
Square -
l = 5
w = 5
5 × 5 = 25
Triangle -
b = 5
h = 5
(5 × 5) ÷ 2
25 ÷ 2 = 12.5
There are 4 triangles
12.5 × 4 = 50
50 + 25 = 75
Surface area = 75 in²
Hope this helps :)
Surface area of the pyramid= 4*(area of the triangle) + area of the square
Area of the triangle = (1/2)*base*height=(1/2)*5*5= 25/2 in²
Area of the square = 5*5 =25 in²
Surface area of the pyramid = 4*(25/2) + 25=2*25 + 25=75 in²
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