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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
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∙ 11y ago
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What is the size of an interior angle on a regular 15-sided shape?
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A congruent angle is always 90?
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".
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?
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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.
Is a rectangle a figure with no angles the same size?
No. All rectangles have 4 interior angles each measuring 90 degrees.
