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Answer:
- ∠1 = 60°
- equilateral triangle
Step-by-step explanation:
The sum of angles in a triangle is 180°, so we have ...
60° +60° +∠1 = 180°
∠1 = 180° -120° = 60°
The measure of angle 1 is 60°.
All of the angles are the same, so this is an equiangular triangle, better known as an equilateral triangle.
Step-by-step explanation:
The sum of three angle of any triangle is <u>1</u><u>8</u><u>0</u><u>°</u>....
-5, because subtracting a negative is the same as adding a positive, which will bring -9 up to -5