Question

Find the total area for the regular pyramid

T.A = ​

Answer 1

4 + 4sqrt(10)

Explanation:

TA = square + 4(slant triangles)

Area of square = 2² = 4

Use pythagoras theorem to find the slant height 'h':

h² = 3² + 1²

h² = 9+1 = 10

h = sqrt(10)

Area of a triangle = ½×2×sqrt(10)

= sqrt(10)

TA = 4 + 4(sqrt(10))

TA = 4 + 4sqrt(10)

sqrt: square root