Which group of bacteria are said to be as anicient type ?
Fill in the blanks with suitable answers.
(i) A triangle has ………. Vertices.
(ii) Triangles are grouped into ………. types according to their sides.
(iii) Triangles are grouped into ………. types according to their angles.
(iv) In a scalene triangle three sides are not ……….
(v) If one angle of a triangle is 90°, the triangle is said to be ………..