Triangles

2. - The amount of space inside a triangle, usually calculated as
4. and
6. - The total length around a triangle, calculated by adding the lengths of its three sides.
7. - A triangle that has one angle equal to 90 degrees.
10. - A triangle in which all three sides and all three angles are equal.
12. - A triangle with two equal sides and two equal angles.
14. - Two triangles (or any other shapes) are congruent if they have the same size and shape, with equal corresponding sides and angles.
15. - A point where two or more straight lines meet, typically used to describe the corners of a triangle.

1. - The longest side of a right-angled triangle, opposite the right angle.
3. - A figure formed by two rays (sides of the angle) that share a common endpoint (the vertex).
4. - Any side of a triangle, often used as the reference side when calculating area or height.
5. - The straight edges of a triangle, typically denoted as
8. - A polygon with three sides and three angles.
9. - The perpendicular distance from the base of a triangle to the opposite vertex.
11. - The perpendicular distance from a vertex to the opposite side (or its extension) in a triangle.
13. - A triangle in which all three sides and all three angles are of different lengths and sizes.