Answer:
C. 19.5 cm5
Step-by-step explanation:
The small triangle's height is 6cm and the width is 2 cm.
Multiply them both to get 12cm.
Since it is half of the full model we will divide by 2. 12 ÷2=6.
For the bigger model, the width is 3cm, and the height is 9cm.
3cm x 9cm = 27cm.
Since it is half of a full triangle, we half to divide by 2.
27 ÷ 2 = 13.5
HOPE THIS HELPS :)
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