**Question 1:**

**How Many Triangles are there in the Given Figure?**

**Answer:**

**18**

**Solution:**

**Number of triangles=4*2 + 4*2 + 2= 8+8+2=18**

**Question 2:**

**How Many Triangles are there in the Given Figure?**

**Answer:**

**28**

**Solution:**

**Number of triangles=4*2+4*2+4*2+2+2=8+8+8+4=28**

**Question 3:**

**How Many Triangles are there in the Given Figure?**

**Answer:**

**2**

**Solution:**

**Number of triangles=2=ABC and ADE**

**Question 4:**

**How Many Triangles are there in the Given Figure?**

**Answer:**

**6**

**Solution:**

**Number of blocks made by vertical line(x)=2=ABF and AFC**

and Number of blocks made by horizontal line(y)=2=BCED and ADE

Therefore,

Number of triangles=[x*y(x+1)]/2

=[2*2(2+1)]/2

=[4(3)]/2

=12/2

=6

and Number of blocks made by horizontal line(y)=2=BCED and ADE

Therefore,

Number of triangles=[x*y(x+1)]/2

=[2*2(2+1)]/2

=[4(3)]/2

=12/2

=6

**Question 5:**

**How Many Triangles are there in the Given Figure?**

**Answer:**

**30**

**Solution:**

**Number of blocks made by vertical line(x)=4=ABC,ACD,ADE and AEF**

and Number of blocks made by horizontal line(y)=3=HBFJ, GHJI and AGI

Therefore,

Number of triangles=[x*y(x+1)]/2

=[4*3(4+1)]/2

=[12(5)]/2

=60/2

=30

and Number of blocks made by horizontal line(y)=3=HBFJ, GHJI and AGI

Therefore,

Number of triangles=[x*y(x+1)]/2

=[4*3(4+1)]/2

=[12(5)]/2

=60/2

=30

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