Respuesta :

Answer:

D.

Step-by-step explanation:

The dark triangle is 6cm and the light is 10.5cm

Answer:

D 16.5

Step-by-step explanation:

6x2=12 divided by 2 equal 6. Answer to left triangle

7x3=21 divided by 2 equal 10.5 answer to right

Then add 10.5 +6= 16.5