Triangular fun

Geometry Level 2

Consider a triangle with vertices $A, B$ and $C$ such that the two of the interior angles are $\angle A = 20^{\circ}$ and $\angle B = 10^{\circ}$ .

What kind of triangle is it?

Equilateral Its actually an oblate spheroid Right There is no such triangle A four sided triangle Scalene None of these Isosceles

2 solutions

David Pilling
May 26, 2016

Since all the sides will have different lengths, its $\boxed{scalene}$

Ashish Menon
May 28, 2016

Two angles are $20^°$ and $10^°$ , so the other angle would be $180 - \left(20 + 10\right) = 150^°$ . Since all angles are different, the length of its sides would also be different, thus making it $\color{#69047E}{\boxed{\text{scalene}}}$ .

Triangular fun

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