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A quadrilateral - if the sides are straight lines.

Q: What is a closed figure having four sides and four angles?

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The sum of the measures of the angles in a figure having 9 sides is 20 degrees each angle.

Cjic

A triangle whose sides are curved outwards.

If the sides are all equal, and opposite sides are parallel, then the angles are all equal (72º) and it is a 'regular hexagon'. A six sided plane figure is called a hexagon, as "hex" means "six."

The figure which is always a rectangle is a SQUARE having four straight sides and four right angles.

Related questions

A closed figure having three sides and three angles

A triangle is a geometric figure that is made of three line segments. It is a closed figure and has three angles.

The sum of the measures of the angles in a figure having 9 sides is 20 degrees each angle.

Closed figure; five sides; five angles.

If you mean EQUAL sides and angles, than an equilateral triangle.

A nonagon. It also has nine sides.

In a closed figure of n sides the internal angles total (2n - 4) right angles, so in this case the sum is (12 - 4) x 90 degrees, ie 720 degrees.

Polygon

Jeeme

A hexagon is any polygon (closed figure with straight sides) with six (6) sides and angles.

A square...?

The sum of the measures of the angles in a figure having 9 sides is 20 degrees each angle.