Question

7th question help please

Answer 1

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

Answer 2

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 :)