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Can right triangles be regular?
A special right triangle is a right triangle with some regular feature that makes calculations on the triangle easier, or for which simple formulas exist. For example, a right triangle may have angles that form simple relationships, such as 45°–45°–90°.
What are the 4 types of triangle?
This math worksheet gives your child practice identifying equilateral, isosceles, scalene, and right triangles.
Can a scalene triangle be regular?
No, a scalene triangle is not a regular polygon. All the triangles are polygons and are characterised by having three sides.
Do triangles have equal sides?
An isosceles triangle therefore has both two equal sides and two equal angles. A triangle with all sides equal is called an equilateral triangle, and a triangle with no sides equal is called a scalene triangle.
Which type of triangle if any can be formed?
| Isosceles triangle | |
|---|---|
| Isosceles triangle with vertical axis of symmetry | |
| Type | triangle |
| Edges and vertices | 3 |
| Schläfli symbol | ( ) ∨ { } |
Are triangles regular or irregular?
Examples of Irregular Shapes
| Shape Name | Properties |
|---|---|
| Triangles (except an equilateral triangle, which is regular) | At least 1 or 2 different sides; At least 1 or 2 different angles |
| Rectangle | 4 equal angles; Although the opposite sides are equal, the adjacent sides are not. |
Can a triangle be both acute and isosceles?
An acute triangle has all angles measuring less than 90º. Note: It is possible for an acute triangle to also be scalene, isosceles, or equilateral. Note: It is possible for a right triangle to also be scalene or isosceles. An obtuse triangle has one angle measuring more than 90º but less than 180º (an obtuse angle).
How many different triangles you have formed?
| N | Triangles with 3 diagonal endpoints | Total Number of Triangles |
|---|---|---|
| 6 | 20 | 110 |
| 7 | 35 | 287 |
| 8 | 56 | 632 |
| 9 | 84 | 1302 |