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Sub 505 (Easy)|   Geometry|      
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Bunuel
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The perimeter of the triangle above is 24 Oct 2019, 01:46
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D
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Difficulty:

5% (low)

Question Stats:

91% (00:30) correct 9% (01:11) wrong based on 35 sessions

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The perimeter of the triangle above is

(A) 5√2
(B) 10
(C) 12.5
(D) 15
(E) 25

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D
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lacktutor
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The perimeter of the triangle above is 24 Oct 2019, 02:03
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A triangle above is an isosceles triangle. Base angles are equal to each other.
—> vertex angle is equal to 60 degrees. —> each of the base angles must be equal to 60 degrees.

—> it is an equilateral triangle. —> the perimeter is 5+5+5= 15

The answer is D

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Shrony
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The perimeter of the triangle above is 24 Oct 2019, 02:15
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This is the equilateral triangle.
So,all sides are equal..
So,the perimeterof the triangle=5+5+5=15

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fauji
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The perimeter of the triangle above is 24 Oct 2019, 02:29
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Given 1 : we have 2 sides as same which means -> It is an isosceles triangle.

Given 2: one angle is 60 degree -- > other two should be equal in isosceles --> 60 degree each.

It is an isosceles as well equilateral triangle - each side will be 5 units...

Hence Parameter would be 5+5+5 = 15

Option D it is!!
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