the answer will be triangular/
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I believe the answer would be non-proportional
Answer:
90°
Step-by-step explanation:
Two lines intersect each other at a right angle, making them perpendicular. Thus, the resulting angles will all be 90°, making ∠4 = 90°.
Alternatively, we can use the supplementary angles equation.
Let's call the right angle marked in the picture ∠5.
∠4 + ∠5 = 180°, since the line is also a straight angle which measures 180°.
∠4 + 90° = 180°
∠4 = 90°
Either way, ∠4 = 90°
Hope this helps!
The central angle = 360/12 = 30 degrees Answer.
Exterior angle = 360/12 = 30 so the Internal angle = 180-30 = 150 degrees. Answer
