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vivado [14]
3 years ago
5

7. As a part of a geometry assignment, Ellen drew an isosceles triangle. Which of the following dimensions could represent the s

ide lengths of the triangle Ellen drew?
A) 3, 4, 5
B) 12, 12, 12
C) 16, 16, 18
D) 19, 20, 20.5
Mathematics
1 answer:
Elza [17]3 years ago
6 0
I would go with C because an isosceles triangle has 3 sides, 2 sides are the same size and 1 side is a bit bigger
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Express answer in exact form. Show all work for full credit.
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Answer:

Area = 23.38 square"

Step-by-step explanation:

It is given that a regular hexagon is having a side = 3"

Since hexagon is inscribed in a circle therefore all the triangles formed by the radii and the sides of hexagon will be equilateral triangles.

In a hexagon number of triangles formed = 6

Area of an equilateral triangle = 1/4s²√3

By putting the value of s = 3"

Area of one triangle = 1/4×3²√3 = (9√3)/4

and we know number of triangles formed inside the hexagon = 6

Therefore area of hexagon = 6×(9√3)/4 = 23.38 square"

Answer is 23.38 square"

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