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 pair of congruent angles are those which measure the same size. Therefore, two congruent angles can be of any size, as long as they are of an identical size.Angles of 90 degrees are commonly referred to as "right angles".
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.
No. All rectangles have 4 interior angles each measuring 90 degrees.