Question

Do 70°, 90°, 20° make a triangle and what kind

Answer 1

Yup. The angles of a triangle must add up to 180°—no more, no less.

These angles do: $70+90+20=160+20=180$

As for which kind, we can classify it based on the 90°-angle. Since that's a right angle, we have a right triangle. Additionally, it is scalene.

Answer 2

The angle sum property is that all the angles of a triangle is 180. 

 therefore, three angles given are: angle 70, angle 90 and angle 20

              70+90+20= 180
  
        there its makes a triangle.


   There is a angle 90, so it will make a right angled triangle...

 Hope this answer helped!! :) :)