Answer :
The first, third and fourth create a triangle.
angle 1 + angle 2 + angle 3 = 180
The sum of the angles must be 180° then a triangle will be formed. Then the correct combinations are A, C, and D.
What is the triangle?
Triangle is a polygon that has three sides and three angles. The sum of the angle of the triangle is 180 degrees.
The combination of three angles is given. Show which combination is correct.
a. 50°, 60°, 70°, the sum of angles will be
50° + 60° + 70° = 180°.
This combination will form a triangle.
b. 100°, 30°, 30°, the sum of angles will be
100° + 30° + 30° = 160°
This combination will not form a triangle.
c. 90°, 50°, 40°, the sum of angles will be
90° + 50° + 40° = 180°
This combination will form a triangle.
d. 50°, 50°, 80°, the sum of angles will be
50° + 50° + 80° = 180°
This combination will form a triangle.
More about the triangle link is given below.
https://brainly.com/question/25813512