Explanation:
Right-angled triangles have one of their angles to be 90°.
Angles in a triangle is 180°
=>The other two angles will sum up to 90°
Let x represent the other acute angle
2 less than 3 times the size of the other acute angle.
3(x)-2=one angle.
Equating both angles to 90°
=> other acute angle + one angle =90°
=> x+3x-2=90°
=>4x-2=90°
=>4x=90-2
=>4x=88
Divide both sides by 4
x=22°
Other acute angle=22°
One angle= 3(22)-2
=>66-2
=>64°
Proof= 22+64+2+90=180°
