Answer:
18.7 cm²
Step-by-step explanation:
To work out the area of a triangle you have to use the formula
[tex]\frac{1}{2} * B * H[/tex]
Where "B" is the base and "H" is the height
Since these are decimals, I like to convert them into fractions which makes them easier to calculate with
The base is 4.25 cm which will turn into [tex]4\frac{1}{4}[/tex]
The height is 8.8 cm which will turn into [tex]8\frac{8}{10}[/tex]
Now we use the formula
[tex]\frac{1}{2} * B * H[/tex]
[tex]\frac{1}{2} * 4\frac{1}{4} *8\frac{8}{10}[/tex]
→ Convert to improper fractions
[tex]\frac{1}{2} * \frac{17}{4} *\frac{88}{10}[/tex]
→ Simplify
[tex]\frac{187}{10}[/tex]
→ Convert into decimal
18.7
