![]() The three angles of a quadrilateral are 769,54°, and 108°. What is the size of the adjacent exterior angle?ĩ. An irregular octagon has one interior angle of 130°. What is the sum of the interior angles of a quadrilateral?Ĩ. I am a plane figure with 6 sides, and all interior angles are greater than 90 degrees.ħ. I am a plane figure with 2 sides, each of equal length and 90-degree angles on the sides. Guess the polygon I am a plane figure with 4 sides of equal lengths and 90-degree angles on the sides. Which of the following are polygons? Circle them.ģ. Which of the following are polygons? Give reasons.Ģ. You can combine two or more polygons into one polygon.ġ. A large triangle can be subdivided into triangle 1 and triangle 2.Adjacent angles are supplementary (ie, their sum. Some properties of rhombi: Diagonally opposite angles are equal. Triangle 1 and triangle 2 can be combined to form a large triangle. Answer (1 of 4): The figure which is made up of four straight lines of equal length arranged in a plane in such a way that they form a quadrilateral is a RHOMBUS (plural: rhombi).The interior angles add up to 1080° (135×8), and the exterior angles add up to 360°.ġ.7 Combination and Separation of Polygons:.All sides are equal in length, and all the angles are equal in measure.Every regular octagon has the same angle measures.The octagon having eight congruent sides and angles is known as a regular octagon.The sum of the angles of an octagon is 1080°. When all the five sides of the polygon are equal in length, then it is called a regular pentagon otherwise, it is called an irregular pentagon.Īngles of an octagon: An octagon consists of eight angles. ![]() The five-sided polygon is called the pentagon polygon. ![]() Note: The number of sides in a polygon is equal to the number of vertices.
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