Question

How do you do these geometry?

Answer 1

Explanation:

I guess it should be like this

Answer 2

The angles are 45°, 60° , 75°

Explanation:

Angle sum property:

Sum of all the angles of a triangle is 180°.

Equation:

3x + 5x + 4x = 180

Combine like terms,

12x = 180

x = 180/12

`\sf \boxed{x = 15}`

3x = 3 *15 = 45°

5x = 5* 15 = 75°

4x = 4 *15 = 60°