Question

Question 4

In a right-angled triangle, the angles other than the right angle are

a) Obtuse
b) Right
c) Acute
d) Straight

Answer 1

In right angled $\Delta ABC$,
$\therefore \angle A+\angle B+\angle C={180}^{\circ }$ [angle sum property of a triangle]

$\Rightarrow \angle A+{90}^{\circ }+\angle C={180}^{\circ }\Rightarrow \angle A+\angle C={180}^{\circ }-{90}^{\circ }={90}^{\circ }$
Hence, in a right angled triangle, the angles other than the right angle are acute.