0
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
What else can I help you with?
What is the size of an interior angle on a regular 15-sided shape?
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.
What is the interior angle size of a regular heptagon?
The 7 interior angles add up to 900 degrees and each interior angle is 900/7
What does one side measure as on a equelactrill triangle?
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
What is the angle that is not congruent to the base angles of an isosceles triangle?
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.
What is a triangle with 1 right angle called?
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.
What is never true about a trapezoid?
That all interior angles are equal in size.
What are the size of the interior angles in a triangle?
The 3 interior angles of any triangle add up to 180 degrees
What is called of angles form by two legs of isosceles?
It has 3 interior angles and its base angles are equal in size
A regular polygon an exterior angle of 30 What is the size of the interior angle?
Exterior angles are supplementary with interior angles, so 180-30=150
What is the total size of the interior angles in a regular quadrilateral?
360 Degrees
What is the size of an interior angle on a regular 15-sided shape?
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.
How do you find the angle measurements of a isosceles triangle if you have no side lengths?
Use a protractor and 2 of its 3 interior angles should be equal in size
What is the size of the angles on a regular decagon?
Each interior angle is 144 degrees.
What is the size of the interior angles in a 13 sided polygon?
152.307692 repeating degrees
What is the interior angle size of a regular heptagon?
The 7 interior angles add up to 900 degrees and each interior angle is 900/7
How many angles are there in an isosceles triangle?
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.
What is the total size of the angles in a regular quadrilateral?
The 4 interior angles of any quadrilateral always add up to 360 degrees
