Discusses the properties and types of triangles, explaining that a triangle is a closed figure with three sides and angles. It categorizes triangles into equilateral, isosceles, scalene, obtuse, right ...

Hint: Here having total two diagonals and having four blocks. So formula for that 4 x 2 = 8 number of triangles. Figure – 2 : Number of triangles in Fig – 2 = 16 Hint: Here having total two diagonals ...