isosceles equilateral and scalene triangle worksheet

#ISOSCELES EQUILATERAL AND SCALENE TRIANGLE WORKSHEET FULL#

Count how many ways the triangle will fit into its outline in a full turn (360°).This gives the number of lines of symmetry of the triangle. Count how many ways the triangle can be cut into a pair of mirrored halves.Different numbers of arcs indicate different angles.The same number of arcs indicate equal angles.Different numbers of hash marks indicate different lengths.The same number of hashes indicate equal lengths.To classify a triangle using comparative lengths or angles: in vertices close vertex The point at which two or more lines intersect (cross or overlap). The same number of marks indicate angles are equal in size. Recognise that arcs close arcs (annotation) Curved marks inside the vertex of a shape.The same number of marks indicate equal lengths. Recognise that hash marks close hash marks Short lines marked on the side or edge of a shape.

Recognising line symmetry and rotational symmetry will also help. Understanding different types of angles and that angles in a triangle sum to 180° can be helpful when classifying a triangle.

Other properties relate to the symmetry that the triangle has.are used to represent angles of equal measure. at vertices close vertex The point at which two or more lines intersect (cross or overlap).

Arcs close arcs (annotation) Curved marks inside the vertex of a shape.are used to represent segments of equal length on diagrams. Hash marks close hash marks Short lines marked on the side or edge of a shape.These properties can be annotated on a diagram: with three straight edges is a triangle close triangle A three-sided polygon.Ī triangle is classified by the comparative length of its edges close edge Side of a polygon or a 3D shape. Copyright © Maria Miller.Any polygon close polygon A closed 2D shape bounded by straight lines. This lesson is taken from Maria Miller's book Math Mammoth Geometry 1, and posted at with permission from the author. Could an equilateral triangle be a right triangle? The three angle measures add up toĭifferent-looking triangles with this information, or are they all identical?ġ4. Draw an isosceles triangle with 75° base angles. So that you get an isosceles triangle with 40° base angles. _ °, _ °, and _ °.Īre two angles in an isosceles triangle that haveĭraw another angle of 40° at B, and then continue its side Then, measure off the two congruent sides, making sure they haveī. Those of your classmates, or draw anotherĭraw any angle. Draw an isosceles right triangle whose two sides Draw a scalene obtuse triangle where one side is 3 cm and another is 7 cm.ĭraw the 7-cm side first, then the 3-cm side forming any obtuse angle with theĬompare your triangle to those of your classmates, or draw anotherĭifferent-looking triangles with this information,ħ. Plot in the coordinate grid an acute scalene triangle.Ħ. “equilateral,” “isosceles,” or “scalene” (by their sides). Or “obtuse” (by their angles), and also as Fill in the table by classifying the triangles labeled as (a), (d), (e), and Lastly, if none of the sides of a triangleĪre congruent (all are different lengths),Ģ. “equal”, and lateral means “sided.” Think of itĬongruent, then it is called an isosceles triangle.Īs a “same-legged” triangle, the “legs” being the Length), it is called an equilateral triangle.Įqui- refers to things that are the “same” or This 5th grade geometry lesson defines equilateral, isosceles, and scalene triangles, and has a variety of exercises, including drawingĮxercises, about these topics for students. Menu Equilateral, Isosceles, and Scalene Triangles

Isosceles equilateral and scalene triangle worksheet