WebMar 26, 2016 · You know what the formula for the number of diagonals in a polygon is, and you know that the polygon has 90 diagonals, so plug 90 in for the answer and solve for n: Thus, n equals 15 or –12. But because a polygon can’t have a negative number of sides, n must be 15. So you have a 15-sided polygon (a pentadecagon, in case you’re curious). WebFind the area of a parallelogram having a length of diagonals to be 10 and 22 cm and an intersecting angle to be 65 degrees. Solution: We know that the diagonals of a parallelogram bisect each other. Hence, half the diagonal length will be 5 and 11 cm. The angle opposite to the side b comes out to be 180 – 65 = 115 °
Diagonal - Wikipedia
WebClassify Types. A parallelogram is a quadrilateral made from two pairs of intersecting parallel lines. There are several rules involving: the angles of a parallelogram. the sides of a parallelogram. the diagonals of a parallelogram. Rule 1: Opposite sides are parallel Read more. Rule 2: Opposite Sides are Congruent Read more. WebProof: Rhombus diagonals are perpendicular bisectors (Opens a modal) Whether a special quadrilateral can exist (Opens a modal) Rhombus diagonals (Opens a modal) Practice. … dark horse digimon comic book
What is Quadrilateral? Properties, Types and Examples of ... - BYJUS
WebThe kite is divided into two congruent triangles by the longer diagonal. The longer diagonal bisects the pair of opposite angles. The area of kite = 12× d1× d2, where d1, d2 are lengths of diagonals. Perimeter of a kite with sides a and b is given by 2 [a+b]. The sum of the interior angles of a kite = 360°. WebA rhombus is a type of parallelogram, and what distinguishes its shape is that all four of its sides are congruent. There are several formulas for the rhombus that have to do with its: Sides (click for more detail) All 4 sides … WebThis fits best with the nature of twentieth-century mathematics. It is possible to function perfectly well with either definition. However, it is important to have agreement in a math class on the definition used in the class. ... By the diagonals are transversals, so the marked angles are equal: angle BAE = angle DCE and angle ABD = angle CDE ... dark horse fastback