Assuming you mean a regular
12-gon:
sum(exterior_angles) = 360o
→ exterior_angle x number_of_sides = 360o (since for a regular polygon they are all the same size).
→ exterior_angle = 360o ÷ number_of_sides
interior_angle + exterior_angle = 180o
→ interior_angle = 180o - exterior_angle
= 180o - (360o ÷ number_of_sides)
= 180o - (360o ÷ 12)
= 180o - 30o
= 150o
156 degrees Sum of interior angles of a polygon=180(n-2), where n is the number of sides. To find one interior angle's measure, divide by the total number of angles, which is also the total number of sides.
The 7 interior angles add up to 900 degrees and each interior angle is 900/7
The 3 sides of an equilateral triangle are all equal in length and its 3 interior angles are equal in size each measuring 60 degrees
The sum of the internal angles of a triangle is 180 degrees. If you know the size of the angles at the base of an isosceles triangle, the final angle can be found by subtracting the size of the two known angles from 180.
A Right- Angled triangle. Also Equilatertal ; the three sides are of equal length, and the three angles are all 60 degrees. Isosceles ; two sides of equal lnegth, and two angles of equal size. Scalene ; all three sides are unequal in length, and all three angles are different. In all cases the sum on the three interior angles equals 180 degrees.
That all interior angles are equal in size.
The 3 interior angles of any triangle add up to 180 degrees
It has 3 interior angles and its base angles are equal in size
Exterior angles are supplementary with interior angles, so 180-30=150
360 Degrees
156 degrees Sum of interior angles of a polygon=180(n-2), where n is the number of sides. To find one interior angle's measure, divide by the total number of angles, which is also the total number of sides.
Use a protractor and 2 of its 3 interior angles should be equal in size
Each interior angle is 144 degrees.
152.307692 repeating degrees
The 7 interior angles add up to 900 degrees and each interior angle is 900/7
There are 3 angles in an isosceles triangle and 2 of them are equal in size. The 3 interior angles add up to 180 degrees.
The 4 interior angles of any quadrilateral always add up to 360 degrees