Question

Geometry Find the area of the rectangle or triangle.

Short answer

Area of triangle $=28-4c$ square units

Step-by-step solution

Step-1-Formula for area of triangle

Area of triangle $=\frac{1}{2}\times base\times height$.

From given information,

Base of triangle $=8$.

Height of triangle $=7-c$.

Step-2-Substituting given values

On substituting given values,

Area of triangle $=\frac{1}{2}\times 8\times \left(7-c\right)$.

Area of triangle $=4\times \left(7-c\right)$.

Area of triangle $=4\left(7\right)-4\left(c\right)$.

Area of triangle $=28-4c$.

Step-3-Conclusion

Therefore, the area of triangle $=28-4c$ square units.