Triangles

4. angled a type of triangle that has one of its angles equal to 90 degrees.
8. A perpendicular line segment of one side joining the opposite vertex of a triangle.
10. A triangle having two equal sides is called as an
11. a plane figure with at least three straight sides and angles, and typically five or more.
12. a plane figure with three straight sides and three angles
13. the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet.
14. The space covered by the figure or any two-dimensional geometric shape, in a plane, is the area of the shape
15. having the three sides of unequal length

1. Point of concurrence of three side bisectors is called as
2. Point of concurrence of three medians of a triangle is called as
3. The theorem now known as Pythagoras's theorem was made by him
5. A quadrilateral is a closed shape that has four sides, four vertices and four angles.
6. The side of a triangle which is perpendicular to the altitude.
7. the longest side of a right-angled triangle, opposite the right angle.
9. the branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogues.
13. the vertex which is in some sense the "highest" of the figure to which it belongs