4. The length of the base of a triangle is 8.2cm. The area of the triangle is 39.77 cm2.
Shen works out that the perpendicular height of the triangle is 7.9cm
a. Without using a calculator, explain how you can tell that Shen is wrong.
b. Work out the perpendicular height of the triangle
39.77 cm2
8.2cm
c. What mistake do you think, Shen made?

(Can you guys help me here is the the picture can you help me pls)