Question

number of triangles 3 4 ? ? perimeter (units) 5 6 ? ?

Explanation:

Step1: Analyze number of triangles

The number of triangles in each figure: first is 3, second is 4. The pattern is increasing by 1 each time. So third should be \(4 + 1=5\), fourth should be \(5 + 1 = 6\).

Step2: Analyze perimeter

Perimeter: first is 5, second is 6. The pattern is increasing by 1 each time. So third perimeter: \(6+ 1 = 7\), fourth perimeter: \(7 + 1=8\).

Answer:

For the number of triangles: 5, 6; For the perimeter: 7, 8