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An equilateral triangle has sides of length 20. To the nearest tenth, what is the height of the equilateral triangle.

A). 10.0
B).11.5
C).17.3
D).23.1

Respuesta :

Answer:

d

Step-by-step explanation:

icerina006

Answer:

C. 17.3

Step-by-step explanation:

Using Pythagoras theorem

Divide the triangle into half

c^2=a^2+b^2

20^2=a^2+10^2

400=a^2+100

400-100=a^2

300=a^2

17.32=a^2

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