Similar triangles what the answer
2 answers:
Answer:
x = 8
Step-by-step explanation:
Since the triangles are similar then the ratios of corresponding sides are equal, that is
=
=
( cross- multiply )
(2x + 4)(x + 10) = (x + 7)(2x + 8) ← expand factors on both sides
2x² + 24x + 40 = 2x² + 22x + 56 ( subtract 2x² from both sides )
24x + 40 = 22x + 56 ( subtract 22x from both sides )
2x + 40 = 56 ( subtract 40 from both sides )
2x = 16 ( divide both sides by 2)
x = 8
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So..hmm check the picture below
the pyramid is really just 4 triangles and 1 square at the bottom, all stacked up to each other at the edges
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and get the area of each triangle, notice the base is 6, the altitude or height is 9
and add them all up, that's the surface area of the pyramid
the pyramid is really just 4 triangles and 1 square at the bottom, all stacked up to each other at the edges
get the area of the square bottom, is just a 6x6 square, thus the name of the pyramid
and get the area of each triangle, notice the base is 6, the altitude or height is 9
and add them all up, that's the surface area of the pyramid