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make six equilateral triangles depending on the size edit: If it is an equilateral triangle, draw a line from each corner to the centre of the opposite side.
Equilateral Triangle.
No Equilateral triangles are triangles that have all of its three sides the same exact measurement. This means that if all the sides are the same then all of the interior angles will equal the same. And they always equal 60 degrees in an equilateral triangle. Equivalent traingles are just traingles that are equal in size and angles to another triangle equal. Equivalent traingles can be equilateral but they do not have to be.
A Triangle has THREE sides. ; not necessarily equal . However, triangles are then sub-divided into ;- EQUILATERAL ; All three sides are the same length , and all three angles are 60 degrees. ISOSCELES ; Two sides are of equal length and two angles are of equal size. RIGHT-ANGLED ; All three sides can be of different length , or it can be an Isosceles triangles. However, there MUST be ONE RIGHT Angle (90 degrees). SCALENE ; All three sides are of different length , and all three angles are of different size.
The shape that has three lines of symmetry is the equilateral triangle. It also has three angles of equal size and three sides of equal length.