Question

Question C.

To the nearest tenth of a cm, what is the perimeter of the figure if the dashed line is 4 cm?

Answer 1

Explanation:

for the rectangle, it is (2l + 2w) - l = P (modified)

(2*4 + 2*2) - 4 = 8

for the triangle, the hypotenuse, is a^2 + b^2 = c^2

2^2 + 4^2 = c^2

4 + 16 = c^2

20 = c^2

c = 4.5cm (rounded to the nearest tenth)

Now we add all the perimeters.

8 + 2*4.5 = 8 + 9 = 17cm