Answer:
<u>Question 1 -</u>
The angles in a triangle always add up to <u>180 degrees</u>.
<u>Triangle 1 (the very left) -</u>
Equation: 180 - (35 + 50) = <em>x</em>
<em>x</em> = 95
<u>Triangle 2 (the middle) -</u>
Equation: 180 - (60 + 90) = <em>x</em>
<em>x</em> = 30
<u>Triangle 3 (the very right) -</u>
Equation: 180 - (137 + 28) = <em>x</em>
<em>x</em> = 15
Step-by-step explanation:
All angles of a triangle add up to 180 degrees.
To write an equation to find the missing angle of a triangle given two angles, you have to first add together the two angles. In an equation, you have to write these added together in parenthesis to show that you need to add those together first. Then, at the beginning of the equation, you write "180 -" to show that you need to subtract the sum of the 2 angles from 180.
Hope it helps!