Write two equivalent expressions to represent the sum of the angles of this triangle.
2 answers:

As we know, Sum of all three Angles of Triangle is equal to 180° [ by Angle sum property of triangle ]
So, the required expression is :

or

if you solve for y, you will get y = 20°
And the angles as 100°, 40° and 40°
Answer:
Step-by-step explanation:
The 3 angles add up to 180 degrees
2y + 2y + 5y = 180
9y = 180
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