Question

In Fig. 11.20, the measures of some angles are indicated. State for each angle whether the triangles are acute, obtuse or right.

Answer 1

Let's observe the angle of the given triangle.

$\angle \text{UVW = 35°, ∠VWU = 25°}$ and $\angle \text{VUW = 120°}$.

Since one of its angle is greater than $90°$ and other two are less than $90°$

Hence, it is a obtuse-angled triangle.