## 1.) How many triangles are in this picture ?

See Answer### There are a total of 20 triangles.

**How?**

Lets count…

Assuming smallest side of a triangle is 1 cms.

Number of triangles with side 1 cms: 12(1 + 5 + 5 +1)

Number of triangles with side 2 cms: 6(1 + 2(triangles facing upward), 1+2(triangles facing downward))

Number of triangles with side 3 cms: 2(1 triangle facing upward and 1 facing downwards).

**Thus, total number of triangles are 20.**