Serious only. (use special right triangles to determine the surface area of a regular pyramid - geometry).

what is the surface area of this square pyramid?
round your answer to the nearest tenth.

122.2 yd²

192.8 yd²

244.4 yd²

513.3 yd²

note: image not drawn to scale.

Option B

Step-by-step explanation:

a=side of square=8.4

h = height of the triangle =

Each triangle on 4 sides would be equilateral because one angle is 60 and isosceles.

Side of triangle s = 8.4

base area =

Area of each equilateral triangle =

Hence surface area = base area +4(area of each triangle)

square yards

Hence option B is right answer

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.