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# What is the perimeter of the triangle shown in the circle above with c

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Math Expert
Joined: 02 Sep 2009
Posts: 50712
What is the perimeter of the triangle shown in the circle above with c  [#permalink]

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04 Sep 2018, 22:48
00:00

Difficulty:

25% (medium)

Question Stats:

94% (00:29) correct 6% (00:25) wrong based on 16 sessions

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What is the perimeter of the triangle shown in the circle above with center O?

(1) The area of the circle is 25π
(2) The triangle shown is isosceles

Attachment:

image005.jpg [ 2.82 KiB | Viewed 152 times ]

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Joined: 20 Feb 2015
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Concentration: Strategy, General Management
What is the perimeter of the triangle shown in the circle above with c  [#permalink]

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04 Sep 2018, 23:07
Bunuel wrote:

What is the perimeter of the triangle shown in the circle above with center O?

(1) The area of the circle is 25π
(2) The triangle shown is isosceles

Attachment:
image005.jpg

(1) The area of the circle is 25π
b*h/2 = $$25\pi$$
r^2/2= $$25\pi$$
r=5$$\sqrt{2}$$
let the third side be a
using pythagoras
a^2=r^2 + r^2
this will give us a
followed by perimeter
sufficient

(2) The triangle shown is isosceles
insufficient

A
What is the perimeter of the triangle shown in the circle above with c &nbs [#permalink] 04 Sep 2018, 23:07
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