Question

It says , the six angles of two different triangles are listed in decreasing order . The list starts 115 degrees , 85degrees , 75 degrees and 35degrees . What is the last angle​

Answer 1

Step-by-step explanation:

the sum of all the angles in a triangle is 180°.

so two triangles=360°.

the last angle=360-115-85-75-35

=50°

Answer 2

Answer: 20 degrees

Step-by-step explanation:

Since the three angles in each triangle must add up to 180 degrees, 115 cannot be in the same triangle as 85 or 75, so 85 and 75 must be in the same triangle. 75+85=160 so the remaining angle in this triangle is 180 – 160 = 20 degrees.

This leaves the other two angles in the list together (115 and 35) which sum to give 150, so the other angle not included in the list is 180 – 150 = 30 degrees.

Therefore the complete list is 115, 85, 75, 35, 30, 20, so the smallest angle is 20 degrees.