Write an algebraic expression that represent the sum of 8 and two-third of x?
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So hmmm check the picture below
the area of that triangular pyramid, will be the area of each of those triangles
notice, you have 4 triangles
2 triangles have a base of 18 and a height of 8
one triangle has a a height of 8 and a base of half 12
and the triangle, at the bottom has a base of 12 and an altitude or height of 18
now. to find the missing side in each right-triangle, simply use the pythagorean theorem
recall, the area of a triangle is 1/2 bh
so.. all you need is the base and height of each triangle, get the area of each, sum them up, that'd be the area of the triangular pyramid
the area of that triangular pyramid, will be the area of each of those triangles
notice, you have 4 triangles
2 triangles have a base of 18 and a height of 8
one triangle has a a height of 8 and a base of half 12
and the triangle, at the bottom has a base of 12 and an altitude or height of 18
now. to find the missing side in each right-triangle, simply use the pythagorean theorem
recall, the area of a triangle is 1/2 bh
so.. all you need is the base and height of each triangle, get the area of each, sum them up, that'd be the area of the triangular pyramid